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  1. NickTransmissions

    Transgo kit 1&2 vs SK 400

    Yep, I thought I recall seeing you had the case assembled. Did you dual feed the direct clutch internally? If not, those instructions for your feed hole sizes are probably fine, assuming a stock stall torque converter and stock to mildly built engine (I think your truck will be used as a tow...
  2. NickTransmissions

    Transgo kit 1&2 vs SK 400

    Lol, there's no point in doing so until I see his responses and, if he asks for such guidance, especially if the transmission is fully assembled and he doesn't want to take it back apart. Insofar as showing him what to do, I have my Youtube channel for that and can provide any one of several...
  3. NickTransmissions

    Transgo kit 1&2 vs SK 400

    Do you still have the transmission apart or is it all together, except for the valve body, filter, gasket and pan? Also have you opened either of those shift kits yet? If not, perhaps you can return them if you're still within the return window...
  4. NickTransmissions

    Project83

    The 4L75E is a crate HP 4L60E variant sold over the counter by GM as an alternative to the 4L80E where power levels exceed 600 but where a 4L80E will not fit without modifying the transmission tunnel, which usually not desiresble to do. To my knowledge, they were never a RPO.
  5. NickTransmissions

    Which 4L80 for my swap

    Thanks, man - appreciate the views. Check this one out, if you haven't already - it's all the things I check for when buying 4L80E cores:
  6. NickTransmissions

    Which 4L80 for my swap

    1999-2000 are optimal, IMO. 1997-98 are good; 2001+ are also fine but 1999-2000 had both the wider coast band (intro'ed in 1999) and first design overdrive roller one-way clutch assembly which has larger rollers than the 2001+ second design OD OWC.
  7. NickTransmissions

    Rebuild th400 or 4l80e?

    I personally have not had experience with those particular coolers but if you do buy one, I'd blow shop air through it to see if there's any manufacturing debris...If so, send it back...Had a customer once that bought a cooler from either Summit or Jegs and hooked it up to a 700R4 I had built...
  8. NickTransmissions

    700R4 Information Thread

    I don't but maybe others on here do...You can also contact Dana Wilkes at Probuilt Automatics to see if he knows or the folks at Automatic Transmission Service Group. It's def something the GM Powertrain engineers would be in a position to answer but I have no idea who they are or how to contact...
  9. NickTransmissions

    My 700r4 changes too early ?

    You need to provide more information about your truck's set up as well as what has already been done to the governor, if anything. Is the engine stock or highly modified? Is this a daily/cruiser or do you have it set up for racing? Have you shimmed or blocked the TV limit valve in the valve...
  10. NickTransmissions

    Passing gear cable

    Bad geometry results in poor line rise which will lead to 3-4 clutch and/or 2-4 band failure...Here's some instructions to help you with getting the geometry right. If that cable is no good, replace it with a different cable though I would imagine you can get it set up correctly...Always verify...
  11. NickTransmissions

    How many bolts hold the transmission on and where?

    Then you don't have a flywheel, you have a flex plate...They are not the same nor can the terms be used interchangeably...Just FYI if you ever have to order a new flex plate and start searching for 'TH400 Flywheels'.
  12. NickTransmissions

    How many bolts hold the transmission on and where?

    Do you have an auto trans or a manual?
  13. NickTransmissions

    How many bolts hold the transmission on and where?

    Not really. It's much easier to simply remove the trans, get it out of the way so the flexplate can be removed and new one installed with ease.
  14. NickTransmissions

    Rebuild th400 or 4l80e?

    Your new aluminum 2-3 acc piston is threaded? I've never encountered that before. It should have a smooth bore. You can use a press or vice to compress the spring to install the retainer clip. Test fit the piston without the spring then put a little assy lube on the shaft if it's a bit snug...
  15. NickTransmissions

    Th400 Torque Converter Shaft Seal

    Since you will have the pump open, do the following checks: - Inspect the pump body working surface for scoring, unusual wear, etc - Check the leading and trailing edge of the crescent - wear here is ceru detrimental to line pressure management inside the unit - Inspect the drive and driven...
  16. NickTransmissions

    Th400 Torque Converter Shaft Seal

    You're welcome...I should clarify my above to say the pump would have to come out and apart so you can replace the bushing, if worn as the transmission will already have been taken out so you can replace the seal. Also wondering if Rock Auto is listing the pump's perimeter o-ring seal that seals...
  17. NickTransmissions

    Th400 Torque Converter Shaft Seal

    Check the pump bushing once you have the front seal off. If it's excessively worn, trans would have to come out so it can be replaced.
  18. NickTransmissions

    350turbo out 700r4 in expected cost?

    2WD or 4X4? Also, are you doing the physical swap or outsourcing it? Figure $150-300 for a cut/balance of the driveline by a driveshaft shop (or a new driveshaft) and perhaps some work to move the X member back. There's also companies that make custom cross members for such swaps. Here's TV...
  19. NickTransmissions

    TH350 Plug Question in case

    Nice, thanks @quicksilver702. Reach out to me off-line if you run into any problems with the build...Since we are in the same city (I'm in Providence which is NW Vegas) I can help, if need be.
  20. NickTransmissions

    TH350 Plug Question in case

    Nice...Please post some pics of the valve line ups and casting itself if you can (no rush)...Curious to see what was done...
  21. NickTransmissions

    TH350 Plug Question in case

    You should be able to either drill through it (be very careful if electing to do to this) or perhaps punch it out with a drift by collapsing it on one side. Do you still have the valve body that was modified?
  22. NickTransmissions

    TH350 Plug Question in case

    Looks like someone may have modified that unit for manual shifting. What does the governor look like? Is the manual low control valve blocked in the vb? How about the kickdown/downshift valve?
  23. NickTransmissions

    Rebuild th400 or 4l80e?

    Keep temps under 200 when using non synthetic, all auto transmissions. Run though the radiator then to an external cooler or vise versa (order isnt as critical, IMO). Two things kill more automatics than anything else: RPMs and heat.
  24. NickTransmissions

    Rebuild th400 or 4l80e?

    Yes - never reuse one way assemblies in any transmission unless you like doing the job twice...While the ones in the TH400s/4L80Es are fairly resilient, if your luck is like mine, they will fail on you if you reuse them. Not worth the gamble to save a few lousy dollars, IMO.
  25. NickTransmissions

    Rebuild th400 or 4l80e?

    Then you don't have any sprag OWCs, you only have roller clutch OWCs (low and intermediate), unless someone has been in the unit prior and replaced the original direct drum with a 4L80E or 64-70 TH400 direct drum (great, if so).

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