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  1. 700r4 shifting but not consistent

    Transmission - Rearend
    I just had a 700r4 rebuilt. It shifted from reverse to drive for about an 2 hours of normal parking/driving. Later it started slipping a little when shifting from forward to reverse. Now it will shift into drive and move forward fine but if I shift into reverse, without turning the truck off...
  2. 4x4 from a '85 700r4 fit a '94 4L60E?

    Transmission - Rearend
    I have a '85 K5 that came with a 305 and a 700r4 with 4x4. I recently picked up a 350 from a '94 blazer/suburban/Yukon, etc. (Dont know which exactly, got that from the casting numbers). The new 94 engine came with a TBI, instead of the 4bbl I have on the 305, so it has a pcm. I want to keep...
  3. 700r4 OD issues

    Transmission - Rearend
    im new hear and this is going to be my first post and its a long one so bare with me. but i posted this in my other forum and no one seemed to even be reading it??? any way i have rebuilt a few 700r4s my self and had no issues like the one im encountering now and having to remove and reinstall...
  4. Installing T-400 into 89 Silverado removed 700

    Transmission - Rearend
    Hello All, I am working on installing an TH400 into an 89 Chevy Silverado that previously had the 4 speed transmission (TH700) with the TV cable. Where is the best place to install the vaccuum line for the modulator and is the wiring there for the down shift relay? Any help on this would be...
  5. LS1 with old school transmission?

    Transmission - Rearend
    Hello, 2 months ago i did a swap my 91 caprice's engine to ls1 . my transmission was a 700R4 and i had difficulties fabricating the TV cable but finally did it. last week in my way to home in the highway the third gear went off, i was cruising at 120km/h at normal rpm. So i need an advise in...
  6. 700r4 Trans condition

    Transmission - Rearend
    I headed for Reno, NV two weeks ago on business in my 1965 Chevelle. I built this car 20 years ago and cruise it weekly so I took the same route to Reno that I did last year. The 700r4 trans has always worked fine behind a Vortec-head 350 engine with cam, headers, 650 Holley carb. As I got...
  7. Another 700R4 Question - Line pressure

    Transmission - Rearend
    I'll keep this short. At what point in the oil flow system of a 700R4 is the pressure port? Is it directly off the pump? Or does the oil goes through the cooler lines first. Sorry I've googled my butt off and have not found out the answer. I have good pressures when cold, but after warm up, all...
  8. GM 700R4 Manual Torque Converter Lockout

    Transmission - Rearend
    So there's a few threads on how the wiring is on these or how to put a manual switch, but I couldn't find exactly what I was looking for. Everyone has 3 wire plugs and a vacuume sensor for the Lockout to engage/disengage blah blah blah. I'm running an 83 GMC originally k1500 with 6.2 and a 700r4...
  9. My 700R4 Build/Debate, long, lots of part numbers

    Transmission - Rearend
    There's lots of contradicting info out here, even in Transgo's shift kits. I'm a little slow. This all started years ago, around 2000 when I bought an 87 S10 with a stock 350, Holley 670 Projection, ...... One of the 1st things I did was install an Art Carr kit in it, which I'm undoing...
  10. 4L60e - High Mileage Transmission Service

    Transmission - Rearend
    Hi All, :welcome: Recently picked up a '94 Chevy 1500 with almost 320k miles. I'll be doing a full tune up and servicing the transmission. Having never done a transmission service myself before, I have a few questions. The plan is to, at the very least, drop the pan and replace the fluid and...
  11. Location of Backup Light switch on 700R4

    I installed a 700R4 in my SBC powered S-10 and haven't been able to locate the switch connection for the back up lights. Is there one on the 700R4 or do I have to rig something else upon perhaps the shifter? :confused:
  12. Cam and Performance Heads vs 383 Stroker for SBC 350

    I have a bone stock 1980 vette with a SBC 350 and a 700R4 transmission. The car is slow as snow and i want to make it faster, but i dont want to piss off my wife and neighbors from the noise of a super loud engine. I have spoken to a local performance shop that said they could stroke the engine...
  13. 700R4 Problematic Transmission

    Transmission - Rearend
    I have a 700r4 in a 1987 full size Blazer with factory 5.7l. I have owned this truck since 2000 and am on my third 700r4. The current 700r4 was installed about 20000 miles ago. It was purchased from Advance Auto Parts, built by Accurate Transmissions as their Bulletproof model with upgraded...
  14. Rebuilt 700R4 problem

    Transmission - Rearend
    Buddy rebuilt 700R4, in vehicle, no driveshaft, trans output shaft turns normal. driveline hooked up, no power to wheels. Jack up rearend, wheels turn. He reassembled everything correctly (assumed. New seals, clutches, etc...Any one thing come into mind? Sprags? Pump? No gauges available right...
  15. 4th/OD no longer engages

    Transmission - Rearend
    Hello all.. I need help. I had the Transgo 700-2-3 Reprogramming kit, a servo, a 2400-2800 locking torque converter, and an B&M ratchet shifter installed in my 87' Formula. The reprogrammin kit and servo were installed at an "auto shop" that my dad knew. The guy said he had done these kits...
  16. 1971 Nova

    Introduce Yourself
    I have a 71 Nova which is very nice, southern rust free body. It has an old tired 350 and a 4 speed. My plan: I have a new crate engine to put in which dynoed at 421 hp and 422 ft lbs of torque. I am also swapping in a 700R4 trans. The rear is a 3.73 posi which is also new along with all the...
  17. 700R4 won't shift into overdrive after it downshifts.

    Transmission - Rearend
    I have a 57 Chevy with 700R4. It shifts out fine through all the gears, but when I have to slow down and speed back up it won't go back into OD. If I come to a complete stop and take off again, it will shift right and go into overdrive. Just won't do it when I have to slow down and speed back...
  18. Weird 700r problem.

    Transmission - Rearend
    So this is silly it makes absolutely no sense to me, theres obviously something wrong with the over drive The good: Trannys brand new (guess thats bad too lol) gears 1-2 are fine, no issues The bad: for example, WOT the 1-2 shift is fine, firm (shift kit) and the 2-3 is fine aswell, but...
  19. 700r4 not shifting to overdrive

    Transmission - Rearend
    I have a carbed sbc350 with a 700r4 in my rod. Been driving around now about 60 miles or so working out all the issues. I installed the kickdown cable and hopefully did it correct. When driving I noticed that it wont shift into fourth. The rest of them shift pretty good, a little rough...
  20. 700r4

    Transmission - Rearend
    I have a 92 firebird with 305 and newly rebuilt 700. Transmission was rebuilt by friend yet now shifts hard from park into drive or reverse. Any help greatly appreciated.