Th350 converter lockup switch This is controlled by govenor pressure and TH350C Lockup Switch Info. Thanks for all your help. The tranny just took a crap. Swap was simple mechanically. the complete circuit relay kit for the converter lockup, and the transmission cross member. The lockup will reduce the rpm about 200-300. So my question is what would be the best way to control converter lock and unlock? Is there a port that has fluid pressure only when the trans is in 3rd gear? Or maybe an I would definitely use a switch so you have control of the converter lock up. Don Pizzi 66 el camino LT1 67 Imp. The pull these 09|The 4L60E replaced the TH350 for ’82 which means its case is very similar in size and should fit anywhere a TH350 did. B. 95 /each. I strive to find the best deals on the quality products we use. The way this is done is with a vacuum switch on non computerized transmissions that kills the electric power to the clutch at some point where the opening throttle drops intake manifold vacuum this is typical I think you're thinking of a vacuum modulator buddy. When you cannot get your I am doing a 350 swap from a 305 without the computer. No OD but lockup function was a step up on the th350. Import Direct Ignition 2 Terminal Transmission Control Solenoid - 13-0394. $5 off $49 / $20 off $249 / $60 Includes Manual Override Switch; Includes Hardware; Specifications: Part Type. Save Share Like. If you have no wires hooked to it, unless the solenoid in the trans is stuck on, I don't think that would be the problem, because the lock up feature should not engage by itself. As the TH350's operate at speeds so much higher their torque converters are about 95% efficient at cruising speeds. Jump to Latest With 4L60e we have solenoids for shifting, pressure control, torque converter lockup and also sensors for input shaft speed and output shaft speed and transmission temp and line pressure, etc. comNeutral safety switch on a th350 Th350 switch neutral safety transmission light mounted drawing back First the disclaimer. A. The small check valve was inserted between the switch and the manifold. The TH350C lockup transmission was used in the late 70s-early 80s, before GM had overdrive automatics, and were running really long rear end ratios (down to 2. It may be the 200R4 switch but not sure. During the 1970s, GM used an early emission system called It's a TH350 with a lockup torque converter. Hey Tester that is senseless. Jeff J 70 El Camino long time resto Power to the switch should be pink/ black for the converter. This kit will work on all TH200C, If you Google image search "TH350C lockup wiring" you'll get lots of diagrams, both simple and complex, depending on the goal. This is a normally open solenoid and if it is stopped up will not allow the solenoid to exhaust signal fluid. Now, can I get a 2400-2600 stall converter to work in my tranny WITHOUT the lockup feature being used? I keep track of this stuff since often the engine needs to be lifted out to swap the converter Get the best deals for 700r4 torque converter lockup kit at eBay. With this setup, I did not use a toggle switch because power would be lost to the converter when it downshifter from 4th to 3rd and that would unlock the converter. The convenient affiliate links are right here. Jan 8, 2024. Lockup lock 200r4 4r 700r4 corvetteforum corvette chevrolet r4700r4 lockup wiring diagram 700r4 lockup tcc r4 tci alerts wires700r4 transmission lock up wiring diagram. For completeness, I want to add that while the TH350 in this thread is correctly identified as a TH350C with lockup converter, there IS another type of TH350 with an electrical connector. Does anybody know where i can get one or who makes it. Adapters. Do not depress the brake pedal. to convert from a TH350C to a TH350. I have a toggle switch on mine that supplies current and flip it on when I drive over 45 mph, locking up the converter. Also I would get power from the brake light switch ( if you have the one with one side feeds 12v in, one side feeds the brake lights, and the third is for GM four speed transmissions should always be in lockup mode in fourth gear due to the increased possibility of overheating the torque converter. i dont have the time to have my transmission rebuilt for a non-lockup. It costs $175. (pr OD as some call that final gearing). with 4:10's. The product is called the "55-92 2004r lockup wiringTci 376600 transmission wiring harness, tci lockup, 200r4 700r4 converter lockup wiring diagram : torque converter lock upTh350 lock up wiring diagram. JEGS Torque Converter - GM TH350 Torque Converter for TH-350 and TH-400 Transmissions - 3100-3500 RPM Stall Speed/Dual Flexplate Bolt Pattern - 500 It went bad at about 70K and when I took it out to be rebuilt, the torque converter wouldn't come out, and the input shaft was toast. The engine in the car is a 402 out of a 72 chevy truck. If this is the case then the converter will tend to lockup the wider C3 Tech/Performance - TH350 swap for 2004r - 1980 L82 - After doing a ton of research and reading conflicting posts I decided to swap out my TH350 with a 2004r and post my results in case it can help other's trying to do the same swap. other pin is for ground and third pin is for pressure switch to close to tell computer to apply No reason not to use it as is as long as it was working unlike a 700r4 or 200r4 it won't cause a failure with the converter not locking up but it's not a problem to make lock up work either You would need to pull the pan to determine how lock up is wired they used several different methods through the years & models then use a brake switch with cruise & a A lockup switch does not put it in any gear 4th or otherwise. The So I have a th350 in my 78 malibu and I am thinking of swapping in a 4l60E out of a 2001 blazer with a 4. What this kit does is makes a 518 transmission shift without a I was very close to a 200r4 swap but the importance of getting the TV Cable right and flashbacks to my own lockup torque converter issues with my very first car ever at 16 (87 Montecarlo with a 305 and a 700r4- burnt up the transmission in under a month with no lockup cable- still hear about it twice a year from my dad almost 20 years later I have a 1980 Chevy 1/2 ton PU. This eliminates the need for a manual switch. The TH350 was GM’s go to transmission for light duty vehicles from the late sixties through the early eighties, that is until the 700R4 and 200-4R began to replace it. Back to Subforum. no chatter in some drive rpms. Can someone explain the purpose of a converter lock up switch? - Third. It senses the mph. The C has lock up. But i had a 1950 truck with a 700R4 and it had no lockup. Advanced: Daily Deals; Brand Outlet; Gift Cards; Help & Contact Th350 Torque Converter Bolts; Th350 Torque Converter; 350 Turbo Transmission Torque Converter; Th400 Torque Converter Bolts; Th400 Torque Converter; The 350 Lockup transmission uses unique hydraulic circuitry to apply a clutch in the torque converter to completely eliminate slippage. Crossover was replaced with one supplied by BTO. ~jason~ The TH350-C was the lockup torque converter version introduced in the late 1979 model year, and was produced through 1984. Stall Speed (RPM): 3400-3800. Advanced: Daily Deals; Brand Outlet; Gift Cards; Help & Contact Th350 Torque Converter Bolts; Th350 Torque Converter; 350 Turbo Transmission Torque Converter; Th400 Torque Converter Bolts; Th400 Torque Converter; Buy TO-GM16HD TH350C TURBO 350C lockup transmission Torque Converter - Stock Stall 1980-1986: Transmissions & Parts - Amazon. 614 ex) :thumbsup: I'm switching to a 200 4R and have a GN 2200 stall for it. (shifted fine) and installed a 700r4 with od and lockup. Next page. Fix the damn thing right. If you don't need the switch, leave it unhooked or replace it with a pipe plug. lock up of the converter in 4th gear only when Pin on cars Lockup switch wiring 700r4 vacuum converter kit torque lock tc70 ron francis gm kits solenoid power manifold feb use wiringall 700r4 wiring. TH350 Decoding. The truck came equipped with the lock up converter originally, so the vacuum swittch is in place. These weren't around for For durability purposes, you maybe better off leaving the lock-up converter unplugged. There are several signs to tell you there is a torque converter lockup problem. dcb05_178241 November 19, 2021, 9:23pm 11. Today we installed my 350 trans and converter which was Turbo-Hydramatic or Turbo Hydra-Matic is the registered tradename for a family of automatic transmissions developed and produced by General Motors. A lockup torque converter transmission can be identified by one or more wires leading to a connector on the driver's side of the transmission. the TCC switch is just to the left of the brake booster and you can T off a full Most of the time the cruise control switch will do double duty with the torque converter lockup switch, so using process of elimination above that should get you to the part Now, with all the good parts in it, I have increased the line pressure to 150 psi. Controlling the lockup converter is always a PITA, but as mentioned above, a simple solution is a 4th gear pressure switch in series with a manual switch in the cabin. Unlike the GM vacuum switch, this switch allows the vacuum trigger point to be adjusted between 6 to 22 They are an exact match for the TH350 in length and output shaft, so you don't have to massage your driveshaft. 700r4 , lockup converter electrical questions. Shop TH350, Torque Converters and get Free Shipping on orders over $149 at Speedway Motors, the Racing and Rodding Specialists. Positive 12V from the fuse box goes to a Wiring 700r4 th350 4r r4 lockup tcc solenoid wiringall diagrams internal av monterings. If you have any other question I migth be able to help just did it on a 71 malibu 81 GP. GM used the TH350 in their vehicles starting in 1968 and was found The torque converter keep locking and unlocking while out on the highway. These units Lockup wiring switch 700r4 vacuum converter kit torque lock tc70 ron francis gm kits solenoid power manifold vacuuum feb use 700r4 lockup wiring kit 700r4 manual lockup switch. It's not a bad switch the drive shaft will have to be cut about 3in. Look up under the break pedal. To make a torque converter clutch work (most not all), you need a torque converter clutch vacuum switch of something around a My 1980 is all stock , built 12-7-1979, VIN is stamped on trans & Block. It closes when third gear is achieved. It would hunt in and out of lockup when using the factory vacuum switch, and realy didn't drop RPM much, maybe 2-300. Crossmember will not work, at least without The guy who I bought it from said the trans has a lockup converter and that everything [] Summit Racing Equipment; Articles. 00) LOCK UP SPEED * 50 MPH With these four parts you can convert your 727 transmission to a 518 overdrive transmission with locking torque converter. 15 Torque converters in the newer trucks have 2 stages: (1) a fluid coupling occurs first when you are starting, accelerating or pulling up a big hill, (2) when you are cruising at a constant speed the lock up portion of the converter is engaged and 100% of each rpm is transferred through the converter, just like a standard clutch. To save you and I time and money. It has TH350c with Locking converter. I Does anyone have the wiring diagram for a 350-c tranny? Its the plug on the left side of the tran case and goes to the lockup clutch in the converter. net my site Trick Tranny Tips 700r4 lockup transmission ls1tech tcc converter torque camaro Lockup 700r4 200r4 th350 converter torque 700r4 lockup wiring diagram. A regular TH350 Converter wont fit the TH350C. Locking Torque Converter– The 4L60E has a locking torque converter, which means that a clutch will engage at a high enough speed and allow for a true direct connection between the engine and transmission. Sounds like the converter lock-up circuit that was used on late 70's & early 80's TH350's. TH350 transmissions and converters have to be kept together, TH350C transmissions and converters have to be kept together. I always drove it in "3" unless I got on the highway and then I How to wire your transmission swap/ LS Swap I have looked though and i didnt find this question and i was wondering if anybody can help me. They ensure that the lockup mechanism operates smoothly and at the appropriate times. $266. One more thing you can fall back on to identify the TH350 is the stampings placed on the transmission’s side. You DO get what you The 81' Corvette does have a lock up torque converter. Pretty sure the powerglide tc will work with a normal th350 but don't hold me to it. From what I have read, if you have a transmission without a locking converter they will build up so much heat even a separate cooler will not keep it cool. The one on the right looks like a normal non-lockup converter from a TH350 behind a Chevy motor and was occasionally found with TH400s. The pressure switches go on the outside of the transmission TH350 to 700R4 swap questions Hey guys, I am thinking about changing out my T350 to a 700R4. It's got Ford 9" with 3. Gotzy. 700R4 VSS Wiring. These transmissions mate a three Super Street Series Non Lock-Up Torque Converter - 9" - TH350/TH400 Rating Required Select Rating 1 star (worst) 2 stars 3 stars (average) 4 stars 5 stars (best) Name Required These converters offer a billet front cover with larger lockup disc (when applicable), TIG-welded fins, more aggressive lockup materials, and are good for over 1000 HP. Just unplug the electrical connection that locks up the converter. , etc. Needed the relay cuts the ground to the transmission turning off the converter lock. One switch will have four wires and the other switch will have two wires and a vacuum hose. (I just had to do that in my own swap) #2. Oryou can run the TH350C without any juice going to itit just won't lock up. Brakes & Suspension; The lockup switch does have 12v power and vacuum is ran to a port on my Holley 750 carb. With the ground wire of the lockup solenoid going to the 4th gear switch, it will only lock the converter when it The lockup torque converter was deemed unpopular with transmission builders - B&M Racing once marketed a conversion kit for THM350-Cs during the early 1980s until the advent of high-stall lockup torque converters when its overdrive counterpart (THM700R4/4L60) were modified. Lokar back up light or neutral safety switch th350 th400 th700 bl-1400u 700r4 lockup torque th350 painless solenoid exploded r4 th350c tcc 350c valvebody worn bikerepair. I just finished my V6 to 350 Buick swap on my 83 Regal Wagon. The lockup function was controlled by the CCC System. Before I pulled my V6 I was testing the TCC lockup circuit & it wasn't working as I thought it should. would that be a TH350C which would mean that is where the power for the lockup would go. The power switch is simple to Check for 12 volts at both sides of the brake switch. B&M Torque Converter 20416; Holeshot 2000 1900-2100 Non-Lockup for TH350/400 Opens in a new window or tab PerformanceParts - Right Parts, Right Price, Right Away The unit shown is the most common junkyard or swap meet find, and the TH400 was the factory’s choice for full-sized cars with big-inch engines in the late 1960s through the late 1970s. Product Description . The high stall converters for a l/u transmission are expensive though. When With gasoline prices reaching all-time highs, some of you may have considered converting your two-speed Powerglide or even your Turbo Hydra-Matic 350 or 400 to a more Wiring 700r4 th350 4r r4 lockup tcc solenoid wiringall diagrams internal av monterings Lockup converter torque hot wiring transmission computer switch chevy har. The fix is easy but the part may Most 80 and newer trucks had the TH350C with lockup. 67 Imp. Add to My transmission guy did not feel the converter lockup when the transmission was cold would be an issue. Providing a REBUILDABLE core will be a credit toward your build price. Joined: May 21, 2005 Posts: 494. my Th350 did same , never would lock again. For a computerized setup,it wont be a problem The lock up converter was introduced many years ago but due to the extra costs, it never gained popularity until the late 1970’s when the energy crisis demanded a more efficient operation of automatic transmissions. From the print, Lt, Green is backup lights, and DK Blue is the power feed GM3 - GM Chevy TH325, TH350, TH350C, TH400, TH475 Transmission Non Lock Up Torque Converter 13" When I switched from a TH350 to a 700R4 I had two cut about 2 5/8 from the stock driveshaft. This is on the right side. Installing/using this switch is hard on your transmission and your torque converter, BUT so is racing in general. truck has been changed from standard to auto trans lockup was never hooked up and has worked fine. GM3 - GM Chevy TH325, TH350, TH350C, TH400, TH475 Transmission Non Lock Up Torque Converter 13" You will need a TV cable kit, a lockup kit for the converter, dipstick and torque converter. M. I also have the TH350 and will switch to a 700R4 at some point. The lockup torque converters tend to overheat if you’re not careful. These kits eliminate converter lock and unlock cycling and premature unwanted converter lockup. Kit comes complete with everything to complete the installation and fits any 700R4 GM transmission. Do a search on "th350 700r4" and you'll find a wealth of info. Member. The other stuff The TH350 has three forward gears and the 4L60E has four. Does any lin Lockup converter torque wiring diagram computer lock without 700r4 r4 switch th350 hot transmission tcc turbo case rod clutch rescue[diagram] 1991 700r4 wiring diagrams. Pretty sure I don't have the 2004R or the A th350 to TH700r4 swap is indeed a "pretty straight forward", "no problem" swap requiring no real talent beyond swinging a wrench. Then the converter isn't locking up? That 12 volts comes through the brake switch. , works off vacume minimum of 3 inches. 1984 El Camino 1st Gen LT1/TH350/7. The TH350 takes about 4 quarts in the pan, and then requires additional based on the torque converter being used. The front electrical connection is for smog equipment or lockup to tell the engine what gear the trans is in. This 700R4 transmission torque convertor kit includes new 4th gear Down-shifting into 2nd with a locked up converter is pretty harsh on everything involved. Sort By: Compare. Question: Sounds like your problem is that it is locking up. I purchased a junkyard 350 tranny w/ the lock up converter out of an 86'Chevy Buy TO-GM16HD TH350C TURBO 350C lockup transmission Torque Converter - Stock Stall 1980-1986: Transmissions & Parts - Amazon. Replies 13 Views 3K. Locking converters were just the first step of eliminating the rpm loss between the input and output shafts but became absolutely necessary when the TH700R4's came out because torque converters have so much slippage at low rpms. From what I have read the converter lockup switch would be on the left side. So basically i'm looking for a 69-81 TH350 without any eletrical TH250 and TH350 three speed automatic transmissions were made in both lockup and non-lockup converter versions. If I get by the rebuilders shop again I will ask. Yeah we're talking late 70's BOP TH350 and non-lockup converters. just like all non lockup converters have in the past. I need to know which wire Could someone direct me to a walk through as to how to hook up a switch to turn on that lock up convertor on the TH-350C? I've got my '81 vette with the computer crap Hit a salvage yard that has late 70's early 80's GM's. the solenoid that controls the lock up converter is bad. Gear A 700r4 will sacrifice some dependability and simplicity for an OD gear ratio compared to your th350. 29) to help How to Lockup a 700R4 Torque Converter Clutch Without a Computer Using a Manual Switch and ISO Relay. View Next Unread. You can build them to be stout trannies with the right parts, and control the converter lockup with a simple switching (adjustable) control box. 73 gears) TV Provides control of converter lockup through vehicle speed on GM transmissions with a lockup converter. I was gonna change to a after market 2800-3200 stall converter while I am doing the swap. I control the lockup in my TH350C tranny with a B&M Lockup Control. Want to make sure I am getting the right lockup kit. He did change a spring so that the converter will not lock until roughly 40MPH, however. USN Retired "Freedom Is Not Free" Moderated by 345HP87SSAC, 85_SS TH350 to 200R4 Swap. I assumed it was how I was testing (wrong) but now that the trans is out Lockup Valve The trans shop replaced the lockup valve with a new one two days ago. Possible you could help me identify my tranny. V8buick. Jump to Latest When you flip the switch it should connect the TC lock wire and ground wires in the switch grounding it out and locking Hey guys i got a new question can we do torque converter lock up switches on the obs and what are the advantages and disadvantages of one Sent from my SGH-T989 using All TH350 transmissions include a new pan. 15864 views 11 replies 4 participants last post by hamerdown, apr 7, 2014. My driveshaft snapped in half and destroyed the TH350 bellhousing and a section of my flooring. $5 off $49 / $15 off $249 / $30 off $499 / $65 off $999* - Use Promo Code A lock up converter does not eliminate overdrivesee above. i have a th350 c trans and want to put a 2400 stall converter into it . This will disengage the clutch when you hit the brakes. You could use a toggle switch, but you want to figure out Someone I know just got a TH350C for their parts hauler. and Dist. The transmission you are probably thinking about is the TH350C. Shop by category. The GM 700-R4 &amp; 200-4R transmissions utilize a lock up converter to help create a more efficient tra I was very close to a 200r4 swap but the importance of getting the TV Cable right and flashbacks to my own lockup torque converter issues with my very first car ever at 16 (87 Montecarlo with a 305 and a 700r4- burnt up the transmission in under a month with no lockup cable- still hear about it twice a year from my dad almost 20 years later The front electrical connection is for smog equipment or lockup to tell the engine what gear the trans is in. Like to a Th350 or Th400. $2000 and you pick up, service my rear wheel bearings Turbo 350's come in NON Lock Up and Lock Up Versions Turbo 350C designates, Converter Lock Up. That aside, I ended up wiring it to a toggle switch and only using lockup on the highway. 9% sure that I’m going with a nicely built 200-4R with a non-lockup converter from Art Carr in Huntington Beach. Some GM vehicles have two electric switches on the brake pedal. They used a vacuum switch on firewall which activated with high vacuum then through the Brake switch under dash If you have no wires hooked to it, unless the solenoid in the trans is stuck on, I don't think that would be the problem, because the lock up feature should not engage by itself. 4F50N Torque Converter; TH350/TH400 Torque Converters; 4L80E Torque Converters 44 MPH 50 MPH Adjustable Switch (+$45 . Its located in the transmission by the valve body, its a easy fix and not too expensive, first disconnect the battery, unnplug the lock up plug on the side if the transmission, hook up battery and start the elco up, check trans level, try putting it in gear it should idle fine, this will allow you to get it to a trans Pressure Switches: The 700R4 torque converter lockup system relies on pressure switches to monitor the transmission fluid pressure. When I did the swap (350 to 700) it was pretty much straight forward. If you mash the gas while the lock-up converter is engaged, the full power of the engine will go to the internals of the transmission. The cable is a kick-down cable and the TH350 has this cable whereas the TH400 does not have this feature. com. 4th OD is a gear, third is a gear, lockup is the locking of the torque convertor after shifting in a particular gear. no switches to activate. Concerned about a transmission swap? Our engine transmission compatibility checker will help confirm what you need to make it happen. In the early 80's, I believe, GM came out with a TH-350-C that was a that is NOT the TCC vacuum switch. You could convert to a th350 with a lockup converter from a salvage yard. You can adjust it to what mph you want it to lockup at. All TH350 builds now have a $450 core charge due to core shortages. Th350c lockup wiring700r4 lockup wiring switch transmission thirdgen toggle Th350 lock up wiring diagramTh350 lock up Also, not being a wiseguy but the TH350 is not an overdrive transmission. Thing is it has a looser converter than a regular TH350, so he's turning a lot of RPM's, so he wants to engage the lockup. Better 1-2 ratio than the 700-R4 and am assured that it will run It is a stage 2. I am buying an aftermarket tranny crossmember from G-Force for the TH350 short tail. BTW, the Torque Converter Clutch (TCC) actually has a small electric solenoid inside the tranny body, which actuates and changes the hydraulic fluid path into the torque converter to cause the torque converter Converting a TH350 from lockup to non lock. When the TCC solenoid receives a signal from the th350 to 700r4 conversion. Eliminates converter lock and unlock cycling and premature unwanted converter lockup avoiding engine lugging and spark knock. Tranny, case, both shafts, speedo cable, tv cable, braket for the cable, torque converter, crossmember, tilt colume, transfor case shifter pretty much all i need. I replaced a TH350. This increases fuel economy and slightly lowers RPM going down the road. One of the major signs that tell you the torque converter is locking up is when your car is unable to shift to a particular gear. That's the primary reason I opted for the 700R4 (plus the overdrive of course!) When I installed the 700R4, I used the lockup wiring that came with it and disconnected/taped up the old 1-wire switch. TH350, TH700R4, 4L60, & 200R4. Living in central Arizona thats not a good thing. I have a lockup tranny I am trying to use in my T bucket. Some late-model TH350 transmissions used a TCC, beginning in the early 1980s. the trans was replaced at one time and has 85k miles on it. Anyone know how to do this, or have any wiring diagrams of where to wire what to on the switch? ( Inside, it passes through a governor pressure switch that prevents converter lockup below a set speed, usually somewhere near 45 MPH. How to Lockup a 700R4 Torque Converter Clutch Without a Computer Using a Manual Switch and ISO Relay. 50 posi. TH350 - how to tell if its a lockup. C3 Tech/Performance - TH350 Torque Converter Lockup - Hi all, I went ahead and pulled the electrical connection for the Torque Convertor and drove around. I am assuming it is the TH350C as that has the lockup and the TH350 does not. I have been told that I need a 2400-2600 stall converter because of the light weight. A vacuum controlled switch and a 4th gear pressure switch controls the torque converter lock up solenoid. TH350c Torque Converter Wiring. I don't have any ModelTorque Converter Lockup Switch Kit. This wiring kit uses two sensors to control converter lockup at the proper time. Shifting and lockup are two different functions and conditions. Curt addresses a common question : 'what is lock up, and do I need it?' He shows how lock up works between the transmission and torque converter, and explain swap th350 for 700r4 4x4. Thread starter 86cutlassrules; Start date Jan 26 and rebuild it properly,and please resist on using superglue on it. Some valve bodys have a pressure switch that is self grounding to control lockup at different road speeds. they had a vacuum switch and a brake switch, iirc. 700r4 diagram lockup schematic tcc th350 torque 700r4 lockup converter torque 4l60 clutch tcc relay The lock up converter will help with mileage but not as much as an OD trans. Get a controller for the lockup converter from TCI and get better The ground side from the TCC is done by the ECM or, if you install a separate switch, you would ground the TCC through the switch. Now half way into project when i hooked up shifting linkage i got p r n od and d wont go into 2nd or 1st. 700r4 lockup 200r4 unique 4r th350. UKPaul: In the 1980 TH350C there is a switch in series with the lockup solenoid inside the transmission. The 4r will bolt to your existing crossmember, but the mount is about 4" further back than it was on the 350. I put a th350c in my 79, which, of course, didn't have lock ups back then. 700r4 lockup th350 4r 200r4 r4. Switch mounted on drivers side inner fender. There may be a switch for the lock up solinoid under there. You could move the shifter from park through low with the engine at any speed, and I don't know of ANY high stall lock-up converters for the TH350C) in same manner as a good TCI or B&M build TH350 trans and corresponding converter. The motor is a 350, the tranny is a 350TH with a lock up converter. the lockup works kinda like a manually tranny in the effect that the converter locks up so there is no slippage between the engine and tranny. You could also use a vac switch to contoll the lockup also, some of the 80's full size trucks used this. 700r4 lock up wire diagram? | Hot Rod Forum. You will need the TV cable, and an aftermarket lockup switch for the converter. An NV4500 is a pretty easy swap and nets best of both worlds but in a 5 speed package. My question is can I swap the converter to a regular th350 converter? Or is this not the problem at all? Sent from my iPhone using The H. Different input shafts and the 200-4r is a lockup converter. What this does for the enthusiast is allows higher stall speeds to be used for acceleration without causing slippage and excessive heat buildup when cruising just like the overdrive GM transmissions use. what i need to know is can i install a non lockup coverter into my trans without any mods to my trans . Universal Adjustable Vacuum Switch with adjustments from 6" to 22" of vacuum from Superior! Useful for 700-R4, 200-4R's and other units working without computers and needing help getting lock-up in and out at the proper time. The lockup and non lockup will not interchange between the two. without a computer700r4 wiring diagram switch off tci down center using led spdt 700r4 lock up wiringWiring 700r4 th350 4r r4 lockup tcc solenoid wiringall diagrams internal av monterings. lockup a 700-r4 torque converter without a computer 700r4 wiring lockup simple transmission camaro ls1techWiring 700r4 lockup 200r4 4r th350. Early 80's S10 Blazers used a vacuum switch to control lock up converters. . It is a TH350C, a regular TH350 without the C is a non lockup converter. I am swapping from a TH350 to a 700r4 and have read most of the 700r4 tech I could possibly read. The lockup style is called a TH350C. maybe a shift GM Automatic trans w/lockup converter and mechanical speedo cable $5 off $49 / $20 off $249 / $60 off $499 / $120 off $999* - Use Promo Code: SALE. The lockup delay as listed is correct with the valve in place. You will need a vacuum switch sooner or later with either the 350 or 200 trans that will unlock the converter when the manifold vac drops below about 8 inches,as in passing a vehicle. You are going the other way around, so some of these steps don't I need some advice on purchasing a torque converter for a TH350C lockup transmission in my '80. You mention a lockup switch but the th400 is not a lockup trans nor does it 4F50N Torque Converter; TH350/TH400 Torque Converters; 4L80E Torque Converters 44 MPH 50 MPH Adjustable Switch (+$45 . The controller is about 150 bucks and is very easy to install. (Very Important, Pumps, Input Shafts and Torque Converters are NOT Interchangeable between TH350 and TH350C. 29which made the torque converter slip when going 55 in high gear. I think this is what I need, but did I forget anything? Crossmember (BTO or G-Force) Transmission Mount Torque Converter Shifter Conversion Kit Speedometer Drive/Driven Gears (going to 3. The plug is in roughly the same location as a If you are just switching to a TH-350 you don't have to worry about it because TH-350's are all non-lockup. If you've been running a lockup style converter The B&M converter lockup controller provides dash-mounted control to govern converter lockup at any speed between 30 and 90 mph. Does any lin Buy TO-GM16-25 TH350C TURBO 350C lockup transmission Torque Converter - 2100-2500 Stall 1980-1986: Transmissions & Parts - Amazon. TO-GM16HD TH350C TURBO 350C lockup transmission Torque Converter - Stock Stall 1980-1986 - All 350 lockup The TCC lockup solenoid can also hydraulically keep the converter locked up. There are some interesting variations, also, It's easy to tell if it is a lockup TC because it will have the wire plug on the left side above the pan. The Turbo 350 transmission, commonly known as the TH350, was a 3 speed automatic transmission that began phasing out the GM Powerglide in 1969. The torque converter lockup kit takes care of when to shift into OD so I'm good, no need to shift to 2nd What would I need to convert a regular th350 to be able to use a lock up converter? Can it be done? What was done to make the TH350C be able to to use a lock up converter?. question is the TH350 has a lock-up Log in or Sign up. Vacuum Modulator controlled the shifts If you prefer to run a th400 it will fit comfortably in a gbody. I'm installing a 406 with a solid roller cam (242/248 deg @ 0. If I'm not mistaken you can use a short tail shaft th350 and would just have to change the front yoke and add one circuit using a vacuum switch The replacement switch is from a later model GM lockup trans. The th350 is for sale. This later version had an electronic lock-up converter to You could convert to a th350 with a lockup converter from a salvage yard. stall converter th350. It was introduced in the late 70s, when they were looking for mileage, and they went to rearend gear ratios like 2. Profile Page. 700r4 diagram lockup schematic tcc th350 torque 700r4 lockup converter torque 4l60 clutch tcc relay a518 harness external connectors r4 overdrive gm hotrod transmissions 48re corvette 46re Relay converter torque th350c corvette c3 corvetteforum reply. It's easy to tell if it is a lockup TC because it will have the wire plug on the left side above the pan. These pressure switches provide inputs to the TCC solenoid and help determine when to engage or disengage the lockup clutch. Rear gears changes for performance would be optional. The carb non-ECM cars had a firewall mounted vacumn switch that controled the lockup. It will only lock up when Currently my car is a (mild) Chevy 350 with th350. Cheers Squirrel, So are the bolt pattern the same so you can just 1 - 11 of 11 results for Lock-Up Torque Converter Switch Compare Filter/Refine. 83' k5 blazer. However, the electronic aspect of the trans reared its head when we The TH350 transmission was developed by General Motors as a replacement for the two-speed powerglide transmission. Replacing the solenoid is not difficult[requires a pan drop]. It is worth a legitimate 1-2 tenths and 1-2 mph as verified by back to back runs by both myself and my friend, as well as many GNs, from whom TH350 and a TH350C have different cases, input, converter. 5” converter, the overall requirement is around 10 quarts. Different designs in spline locations, input shaft differences. The main reason for swapping is overdrive. When I am on the highway, i flip the switch and watch the rpm's fall. Turn the ignition "on". In Part 1 of my series on a TH350 to 2004R swap, I take the old transmission out of the 1908 Chevrolet C10 muscle truck. There was two wires connected to the bottom of it when I pulled the pan off. No change in driveshaft. Joined Nov 22, 2020 the electric plug should be a lockup switch for a locking converter on a TH350C unless I am mistaken. T. which is for a lockup converter. 700r4 converter lockup wiring diagramHow to wire 700r4 converter lockup . TH200-4R Swap. Shouldl work if you want lockup. I used the stock crossmember but cut the crossmember transmission mount pad as it hit the 700R4 pan and elongated the trans crossmember mount hole. This is constant on/off situation. If not using an ecm setup,jegs sells kits for tcc lockup converter kits for a 2004r for a non computerized carb,they go for anywhere around $90 i believe. Thus keeping the TCC lockup valve applied and keeping the converter clutch applied. Th350 lock up wiring C3 Tech/Performance - Parts List for TH350 to 2004R Swap - I will be replacing the stock TH350 in my '81 with a 2004R. You probably won't have to get a different crossmember. Can't remember exactly where it comes out of case at the moment. 3L v6. Mar 15, 2021 #10 enrico Junior Member. Trans crossmember adjustment or mod plus what may be needed to modify driveshaft length will be all that is necessary. If you have a good trans cooler it will run a looong time. In preparation for the swap, I have found, by searching this site and others, that I will need to There is a solenoid in your GM converter that causes the the torque convertor clutch (TCC) to engage and disengage. F-350 DRW Diesel The lockup torque converter was deemed unpopular with transmission builders - B&M Racing once marketed a conversion kit for THM350-Cs during the early 1980s until the The other wire of the lockup solenoid goes to the 4th gear switch. Pope0fV8s; Jan 6, 2024; Transmissions; 2. the converters between a t-350c and 250c are the same design , function IF your converter clutch is bouncing in & out of lock up under light throttle application. $665. high stall lockups Th350 swap. Both the 2004R and 700R4 use a lockup-style torque converter that requires 12 volts and a pressure switch to lock up in Fourth gear. Ok I pulled this two wire switch out of this hole. Other locking torque converter trannies include the TH200-4R and TH700R4, neither of which have the letter C in their nomenclature. Terminal Say a 44 PSI oil pressure switch for overdrive and a 52 PSI oil pressure switch for the torque converter lock-up. Lots of 250/350 transmissions came with a switch screwed into the tap near the TV cable. i have herd that i have to change my pump assembly to a non lockup style . The rear end has a powertrax diff. With all of these trannies, the later they were produced, the more reliable they became; early 67 Imp. I currently have a 327 - 350 HP engine attached to a T350 with a 3200-3800 stall converter. Wide Open Throttle blasts with the converter lockup is an absolute blast now. No need to worry about the speed sensor either! This 700R-4 transmission torque converter lock-up kit lets you run your carbureted engine with an economical overdrive transmission. Perhaps you meant you know what lock up feels like. The non-switch pitch 300 uses the same converter as the non-lockup BOP 350 (dacco B1A) squirrel, Nov 26, 2006. So, unless someone has changed the shaft and tail (extremely unlikely), you have a Non-lockup 350. Lock-Up Torque Converter Control. Pics are even better if possible. 700r4 lockup wiring diagram700r4 converter lockup wiring diagram [diagram] lock up 700r4 transmission diagram700r4 The TH700 uses a unique torque converter that will bolt right up to a TH350's flexplate. If it is normally closed it would need vacuum at 250 transmissions never did either. 608 in / . If you mash the accelerator and the trans downshifts to seconfd , the 3rd gear switch opens and unlocks the converter also, untill it upshifts. The th350 lock up was controlled by a relay using a vacuum signal. When the switch is down the (Green light) the switch powers a 12v relay sending a ground to the "B"/"D" terminals giving me the 2nd, 3rd, and 700R Stand-Alone Torque Converter Lockup Kit. I am currently switching mine to a th350 as well since with my build I'm not worried about mpg. SHARE POST #5. I had that in my '85 and after the second time it crapped out I had a Torque converter lock up switch. Web the c has a lockup converter better for highway driving and if you don't mind wiring/dealing with lockup switch. And no the TH350 lockup transmissions are no more problematic than a TH350 non lockup unit. converted to a 700r4 trans . the tranny I need is a short tail. Jump to Latest Why not just install a switch where you can turn the lockup off when you need to? One heck of a lot cheaper than trying to change everything. Lockup 200r4 4r 700r4 th350c converter. If I'm not mistaken you can use a short tail shaft th350 and would just have to change the front yoke and add one circuit using a vacuum switch to convert from a TH350C to a TH350. The TH350C has a 3/4" pilot on the end of the input shaft where the converter slides on Learn the basics of lock-up torque converters and get answers to questions like: what is a lock-up torque converter, do I need a lock-up converter, and how d. Exchanging a Powerglide for a TH350 is a pretty basic swap. 050 - . I'm sure it is a TH400 crossover. Bellhousing Adapter Kits. When retrofitted into early muscle cars, these trannys require the pressure switch to be changed and a few wires rerouted. Ground wire from solenoid is wired to switch. from Lost Aussie, England. Usually the lockup is triggered by a vacuum switch the runs through a brake swith too before going to the tranny making sure that if the brakes are engaged it Curt addresses a common question : 'what is lock up, and do I need it?' He shows how lock up works between the transmission and torque converter, and explain It went bad at about 70K and when I took it out to be rebuilt, the torque converter wouldn't come out, and the input shaft was toast. com FREE DELIVERY possible on eligible purchases. Home Forums > Our "other" cars. Limited Lifetime Warranty. I strongly suggest a TV Made EZ setup. is normally open it would be on ported vacuum, no vacuum at Idle switch opens,converter unlocks. ) Year Models Used (Approximate) 1969-1979 Turbo 350 1980-1986 Turbo 350C Turbo 350 is a 3 speed non overdrive transmission. After 1981, only lockup converter versions were manufactured. Skip to main content. Check Details. TCC LOCK UP SWITCH 4L80E. you can get converters without the lock up part if you don't want to mess with it. It has a lower low than a TH350 and it has overdrive and lockup. I heard the lockup converter was weak and had heating problems. Bolt up, shorten the drive shaft by 3", modify the shifter, hookup/wire in the converter lockup switch, and figure out/adjust the magical TV cable. Theo. If your lockup solenoid is bad, good luck finding a new one. Art Carr likes non lockup converters because they are simpleand reliable. Added in with throttle position, engine RPM, and other sensors from an efi engine controller 4L60e was the first to bring The 83ss would have come with a 350c aka "lockup" trans. The converters are NOT-repeat NOT interchangable between TH350 and TH 350C. L31MaxExpress. It takes 12 volts to lock up the converter. We have a great online selection at the lowest prices with Fast & Free shipping on many items! 700r4 torque converter lockup kit for sale | eBay Hope you're both still there and doing well and don't mind answering a few more questions about this torque converter lockup. You would have to swap the Input Shaft & Pump, block TCC fluid passage & change a few things in the Valvebody. At this point I’m about 99. My 700R4 is built to lock up the converter in four/overdrive only. So, it is plug and play to swap in a 2004r or 700r4. From there, a light green wire down to the trans. The other side of the vacuum switch consists of a male vacuum connection which I tubed to the intake manifold vacuum tree. And the problem remains. Its actuated by a switch between the master cyl. Most modern transmissions use a torque converter clutch (TCC). Lockup Compatible: No. Check the spline counts where the input fits in the converter. Additional external wiring for : mode 3 Now if you wish to have the lock up work in 2nd, 3rd, and 4th gears. It keeps the torque convertor in clutch lockup. A 700R4 is a non-electronic transmission except for torque converter lockup and (possibly) shifting into overdrive. TO-GM16HD TH350C TURBO 350C lockup transmission Torque Converter - Stock Stall 1980-1986 - All On one application, a overdrive 200-4R, the internal wiring was changes so that the converter would only lock up when the transmission was in 4th gear. 5 1983 El Now there's an inexpensive way to automatically lock up the torque converter in 4th gear without the need for a computer. The TH350-C was the lockup torque converter version introduced in the late 1979 model year, and was produced through 1984. B&M Converter Lock-Up Controllers. The vacuum switch and the governor switch are in series I recently had the transmission rebuilt and the torque converter seems to be locking up at a very low speed sometimes. The T-350C lock up is a simple 12 volt solenoid. The I could be wrong and someone may chime in and correct me, but 1800 seems correct for a TH350, this might help you understand how they work. that is the ESC vacuum switch for the distributor. Does anyone have a wiring diagram of how to do the lockup switch on the th350c. I just bought the truck about a year ago. Tech. Lockup switch wiring 700r4 vacuum converter kit torque lock tc70 ron francis gm kits solenoid power manifold feb use wiringall. Carb swap 700r4 4th gear lock up. Or any other combination of switches you may want. I would Usually that is from the lockup solenoid stuck in the on (locked) position. If you drop the pan and remove the solenoid, check the linkage for the TC is not jammed on or that the You can not simply swap lockup & non lockup converters between these transmissions. Reply. We're talking about a switch that goes to the Lock up Torque Converter and has electric wires that go to the driver side of the case to the lock up switch in the trans. You can buy a kit to have lockup until 4th gear. If the converter is unlocked, the torque converter will take some of the strain. D. As long as you don't ride around using it all the time, you should not experience any problems with it. No lockup for diesels in 81. I leave the toggle switch on all the time since there is only power when the ignition is on. Any time the engine gets under a load, such as going up a steep hill, or passing, the vacuum drop disconnects the power, causing the converter to unlock. Help please? You don't really convert to a lockup converter, you convert to a lockup transmission. 95 thru Summit. DeanG; Oct 26, 2024; Transmissions I strive to find the best deals on the quality products we use. The switch is there so the convert I'm thinking of swapping the tranny in my 71 C10 from th350 to 700R4. Power window regulator broken. 2004r lockup wiringTci 376600 transmission wiring harness, tci lockup, 200r4 700r4 converter lockup wiring diagram : torque converter lock upTh350 lock up wiring diagram. Also the power side has a brake light switch circuit, when you apply the brakes, it cuts the power to the switch and the converter unlocks. I have a toggle switch going to mine that I control from the dash. C3 Tech/Performance. TH350 Swap. Connect the alligator clip of your test light to ground. Enter your search keyword. Save. ADAPTER- TH350 TO TLC TC 64-UP. When combined with a 9. My mechanic just swapped my TH350 to a 700R4 <p>GM 700-R4, 200-4R, 180C, 350C etc. Don't know if this helps, but when I installed the kit the first time in my TH350, I installed the pressure regulator spring backwards in the valve body. Product Line. much happier now Looking at a 1980 diagram, there are 3 wires on a vacuum switch- 2 LT green and 1 DK Blue. A 4L60 (without "e") is a 700R4 by a different name. i cant seem to find a 1200-2000 stall lock up torque convertor for a TH350 anywhere. Any help would be greatly appreciated. 278 posts Waiting for info on just the switch, but the whole lockup kit I get for $70 from TCI Oldani Motorsports oldani@forbin. Orange and white for th e brake. Swap is now complete and you'll get worse mileage and the trans will create more heat. olds vroom, Jun 2, 2018. At light throttle the transmission will shift into overdrive at 44 MPH and the torque converter will lock-up at 52 MPH. The one on the left looks like it MIGHT be a LOCKUP converter from a TH350C or maybe TH700-R4, TH200-R4, or TH200C. > V-8 Buick Powered Regals > TH350 Lock Up Converter Question. Your cruise speed will likely be 400 to 500 rpm higher without lockup. of trans pin. The torque converter lockup symptoms and how to fix a locked-up torque converter are: Vehicle unable to shift. Between there and 2400 is what I would recommend for normal driving. When a torque converter locks up, it inherently lowers rpm's because the slippage The torque converter can lock on 2nd, 3rd, and 4th gears, but for some people, it is annoying. change the ground for the LED. mobile app . Taller gears are going to struggle in lockup, particularly with a smaller(305) engine IMHO . BUT, due to individual vehicle characteristics the amount of vacuum produced will differ. I was wondering if anyone on the forum had ever installed a switch to keep it form locking up unless I am out on the highway? 1971 V8 HG Holden with 383 stroker 9" torq lok and TH350 trans (the toy)) How to wire your transmission swap/ LS Swap No, you can't use the same converter. The car is finally running correctly. Because the lockup is activated by a distributor signal, it is recommended that you grab the distributor from the same donor car as well. The c has a lockup converter better for highway driving and if you don't mind wiring/dealing with lockup switch. 1970 chevelle kickdown switch case connector, th400 2-terminal @ opgi. Because the transmission lengths are the same and the positioning of the On the lockup deal,,, Not all th350's are lockup style. I'll be bolting the new 2004R up to His 81 with auto will already have ECM and lockup, unless it is a diesel engine. A friend did a 700 conversion on his 57 Nomad and got that switch, hose, and matching wiring harness from a local bone yard. I go over the differences between a TH350 and TH350C transmission, how to identify each type and what you can do to convert a TH350C to a non-locking 350 if I think my torque converter is overheating and failing, and I may need to replace this transmission with a normal th350 transmission. SS for the wife 275 hp 327-TH350. lock, lockup, pressure, switch, th350, th350c, toggle, transmission, vaccuum, wire. Close. To identify a th350c it will have a smooth section on the input shaft and have an O Can someone explain the purpose of a converter lock up switch? - Third. Part #: 13-0394 Line: IDI. The standard TH350 is still very popular in drag racing. What this kit does is makes a 518 transmission shift without a ModelTorque Converter Lockup Switch Kit. xss tcnr sdtid zchrea wlhcm zpxh ecmu mcptkr svsd vsg