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  1. NickTransmissions

    TH400 (2WD): New tail shaft bushings are too tight. Why??

    It will be fine...I have to sand TH400 and 4L80E sun gear shaft bushings all the time. Its very common as aftermarket bushings are sometimes a little tight relative to factory when installed. As long as you didnt take too much off, it will be good to go. Your durabond bushing may have gone in...
  2. NickTransmissions

    Turbo 350 3rd gear/reverse issues.

    Hey man welcome to the forum! Unfortunately, it's time for an overhaul so need to pull it and throw it on the bench for teardown and inspection. I have a TH350 Info thread you can refer to for video instructions, parts, mods and other info. Main pointers: - Install a heavy duty intermediate...
  3. NickTransmissions

    Is there a single prong Lock up switch?

    Hi Dan, The small wire going to the transmission's case connector is for the detent solenoid. Th400s dont use a purely mechanical kick down system like the TH350; the detent system is "electro-hydraulic" in that it uses a solenoid to perform the same function as a kick down cable and...
  4. NickTransmissions

    700R4 Information Thread

    I don't get deep into the weeds with the wiring beyond simply installing the harness. However your transmission shouldn't have anything electrical going to the transmission as your transmission's valve body has a mechanical TCC command valve train installed from the factory. All 82-E87 700R4s...
  5. NickTransmissions

    700R4 Information Thread

    Very soon - going to be holding a drawing for autographed, advance limited edition copies for a few lucky winners!
  6. NickTransmissions

    700R4 Information Thread

    You're welcome. Yep, putting the correct housing and gear set w/a new o-ring should solve those problems for you. Regarding the yoke, I must have misunderstood...Can't really speak to that one way or another because I don't get involved in the transmission's removal/reinstallation and can't say...
  7. NickTransmissions

    700R4 Information Thread

    Speedo housings vary based on drive/driven gear tooth count combinations; there's two that I'm aware of: one for 34-39 tooth driven gears and one for 40-45 tooth driven gears. Not sure whether welding or not would cause issues but I'm inclined to think not assuming the weld was done properly...
  8. NickTransmissions

    700R4 Information Thread

    I like Raybestos Blue Plates for full race; I don't use the Alto Reds too much. Either Alto's or Borg Warner's high energy max pack/power pack modules will work nicely in a street/strip application.
  9. NickTransmissions

    700R4 Information Thread

    Good question - hopefully someone else can chime in as I don't do anything with the vehicles themselves, my work is entirely bench/carry out but I would imagine any brake or similar switch could work for what you're trying to accomplish. But that's really just a guess at this point.
  10. NickTransmissions

    C10 frame swap 4x4 4l60e?

    You can use the 96-97 4L60e with the 2002 computer, it will control it just fine. Look for a 97 as opposed to a 96...1997+ 4L60Es came with much better forward drum bonded steel and rubber apply piston compared to 96 and back that had the aluminum pistons for the forward and coast clutch and...
  11. NickTransmissions

    700R4 Information Thread

    Looks like a pre-auxiliary valve body unit. Ask them if they installed a mechanical lock up kit in the valve body. If they didn't and it still has the two aluminum slugs installed in the TCC control valve bore location, as many of those came from the factory, you can install a Transgo or...
  12. NickTransmissions

    700R4 Information Thread

    Follow these instructions once you have filled the trans to capacity (700r4 w/stock pan should take 10-11.5 quarts, not counting cooler capacity). Look at the first digit of the number stamped into the case on the rear passenger side of the trans, right above the pan and let me know what it...
  13. NickTransmissions

    700R4 Information Thread

    I'd love to sample what whoever gave you that advice about the converter is smoking...unlike the TH350C, the 700R4 must have a functioning tcc lock up mechanism or a tcc non-lock up conversion kit installed. What year is your 700R4? What TCC lock up kit did you purchase (if any)? 82-87 had...
  14. NickTransmissions

    700R4 Information Thread

    Thanks, man and stay tuned. I'll be uploading a teardown and inspection of a TH475 to my YT channel in a couple weeks...
  15. NickTransmissions

    700R4 Information Thread

    As long as the installer sets up and adjusts the TV cable correctly and validates the set up via a transmission pressure gauge, taking readings at idle and full TV for each range setting, it will be fine...Readings should be 50-70 PSI in P, N, D while R should be 100-120PSI and manual low/manual...
  16. NickTransmissions

    700R4 Information Thread

    Gotcha...Yep, replace the converter asap as the TCC sounds like it's slipping as leaving it unplugged just results in runaway overheating and stresses the front gear train and clutch packs in the forward and rev input drums.
  17. NickTransmissions

    700R4 Information Thread

    Yep, just saw his response. No worries, I imagine you/he can resolve but feel free to post any questions here if need be...
  18. NickTransmissions

    700R4 Information Thread

    What's wrong with your TCC lock up? Is it simply not locking up or locking and staying locked up when it shouldn't? Or something else?
  19. NickTransmissions

    700R4 Information Thread

    Yes, it shouldn't be shifting while TCC is locked up...TCC applies while in third, unlocks once you accelerate sufficiently -->shift to 4th--> TCC applies while in 4th. Downshift TCC apply strategy is the same. Are you having issues w/your TCC lock up or just wanting to know more about how it...
  20. NickTransmissions

    Shift shaft seal leaking on 700r4?

    Not worth it IMO. You're paying for the entire harness, pcm etc all of which either must come from the same vehicle or be programmed so the ECM and TEHCM are speaking to each other correctly. You're also playing for integration into your vehicle (x member, drive shaft, u joints, programming and...
  21. NickTransmissions

    700R4 Information Thread

    Converter unlocks anytime you hit the brakes, accelerate enough and/or the 4th and 3rd gear pressure switch no longer sees a hydraulic pressure signal from the governor (same principle for those models designed to have lock up in second), opens thereby cutting power to the tcc solenoid which...
  22. NickTransmissions

    Shift shaft seal leaking on 700r4?

    Yes, afaik the selector shaft is the same diameter and process is the same when using the removal tool for all applicable transmissions. If dropping the pan, the th400, 4L80E and 6L transmissions use retention pins in addition to everything else (the TH400's resembles a finish nail but it's...
  23. NickTransmissions

    Shift shaft seal leaking on 700r4?

    There's two methods: Use the special tool to remove the seal and a 15mm socket to install a new one or Drop the pan, remove the selector shaft (remove the 15mm retention nut with a wrench, remove the flex spacer with a flat blade screw driver, tap on the rooster comb to get it to unseat from...
  24. NickTransmissions

    700R4 to 4L80E in my 87 Chevy Blazer

    Call Summit, if you haven't already - their tech support should be able to guide you to the right ECM for what you're trying to do...There's also plenty of harness kits available as well...Also, check eBay if you haven't already - they sell VATS-free ECMs 0411 and L29....Vet the sellers...
  25. NickTransmissions

    Torque Converter Recommendation

    You're welcome! Short answer to your question: Nope....There is only one fix for that problem... Installing a .500 boost valve in a 700R4 might prolong life of the 3-4 pack but will only delay the inevitable by a few thousand miles or so...13 vane pumps were introduced to provide greater line...

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