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  1. NickTransmissions

    2007 escalade transmission

    That’s my bad, I asked him to post in my 6L80 thread instead resurrecting another member’s when I saw his initial post…
  2. NickTransmissions

    Tonyrodz's Tahoe Build Thread

    Worn band/3-4 clutch, gear train/shaft spines, valve body in that order of most likely to least likely. Another possibility is VSS but rare. Reviewing your symptoms its not likely to be solenoid related, otherwise you wouldn’t have normal, sequential upshift or downshifting. Swapping...
  3. NickTransmissions

    GM 6L80 Transmission Information Thread

    You can do either / or but I’d do neither. I’d rebuild / convert your original unit using a Circle D Level 2 or 3 kit along with other prudent upgrades (billet 1234 piston, six pinion 6L90 front planet, fully reconned/upgraded pump, weld reinforced 35R drum, etc) plus all new OEM...
  4. NickTransmissions

    SOLVED: Lost 5&6th gears

    I turned off my PMs as too many people were sending me messages w/questions that should be asked on the forums. Doing support via PM defeats the purpose of having such a forum in the first place. Can you start a new thread and tag me there or post the above questions in my 6L80 Information...
  5. NickTransmissions

    Tonyrodz's Tahoe Build Thread

    Shift solenoids A&B are identical so you can swap them between the 1-2 and 2-3 shift valve positions on the valve body. When you drop the pan, you'll have a much better idea as to whether solenoids will resolve the problems or not.
  6. NickTransmissions

    SOLVED: Lost 5&6th gears

    You're welcome. Nothing special insofar as preventative maintenance beyond what you already have scheduled, unless you want to get into the valve body, vacuum test it and install a Sonnax or Transgo VB kit and new spacer plate. You can also bench test the TEHCM at that time. Sometimes...
  7. NickTransmissions

    SOLVED: Lost 5&6th gears

    Sounds like the 456 clutch pack is burnt. Drop the pan, if you haven’t already done so. If there’s a bunch of burnt clutch material at the bottom, pull it for overhaul.
  8. NickTransmissions

    P0700 and P0709 codes on PPV Tahoe

    Drop the pan and see if what’s at the bottom. If there’s a bunch of metal and/or burnt clutch material, put the pan back on with a few bolts and yank it for overhaul. At 207k it’s due…
  9. NickTransmissions

    **(FIXED)** 2016 gmc Yukon 6l80 issues after rebuilding

    Cool - I sent you a PM...Take a look when you have a few moments and we can go from there.
  10. NickTransmissions

    Transmission Temps??

    My 6L80 in my truck runs between 185-210 in the summer; otherwise 145-165 when on the road for a while all other seasons. What temp did it typically run when it was functionally operating normally prior to the rebuild?
  11. NickTransmissions

    **(FIXED)** 2016 gmc Yukon 6l80 issues after rebuilding

    It’s not super common but not super rare either. It happens often enough for me to mandate replacement on all overhauls. There are other builders who reuse them, citing low likelihood of them going bad (in the builder’s warranty period - the part left unsaid). I’d love to test that TEHCM - I...
  12. NickTransmissions

    **(FIXED)** 2016 gmc Yukon 6l80 issues after rebuilding

    Glad you were able to get it fixed. I never reuse TEHCMs in my 6L builds, for that reason. Do you still have that bad TEHCM?
  13. NickTransmissions

    **(FIXED)** 2016 gmc Yukon 6l80 issues after rebuilding

    Did you replace the TEHCM? Thinking not since you mentioned replacing pressure switches (which is not possible to do-you a replace the diaphragms and seals, not the switches themselves). What were the vacuum test readings for the pump stator support and valve body castings? Did you machine...
  14. NickTransmissions

    Service 4WD, no power to wheels

    Yes - it's called the transfer case encoder motor assembly. Inside of the motor there is a sensor, which often goes bad. The T-case motor's job is to shift the T-case in and out of gear (2H, 4H, 4L). If it goes bad a chassis DTC will set / store and you will lose transfer case functionality...
  15. NickTransmissions

    Dexron III or Dexron VI?

    Dex6 full synthetic or Dex/Merc (conventional) will work - brand is your choice.
  16. NickTransmissions

    Dexron III or Dexron VI?

    Ah, you’re correct. The 8 speed stuff is classed as “low viscosity”, not ultra low viscosity like the fluid for the 10-speeds. Wondering now if the LV fluid intended for 8Ls is formulated the same as the Mercon LV intended for Ford six-speeds (6R80, 140, etc). If so, it should be perfectly...
  17. NickTransmissions

    Dexron III or Dexron VI?

    Please let us know how you like the HP stuff in your 60E. I believe that fluid is ULV but otherwise have never had anyone provide first hand experience when retrofitting it to older units.
  18. NickTransmissions

    Dexron III or Dexron VI?

    I didn’t block you, specifically. I turned off my PMs as too many people were sending me messages asking questions that should be asked here on the forum. There is zero reason to send anyone PMs with tech questions as it’s completely redundant and defeats the purpose of having an open forum...
  19. NickTransmissions

    GM 6L80 Transmission Information Thread

    @Chughart - normal.
  20. NickTransmissions

    GM 6L80 Transmission Information Thread

    Bumping the thread with a new video that covers all the parts and procedures for a complete/proper 6L80 Level One build for stock, daily driver applications. Feel free to check it out if you have some time. Enjoy and TIA watching! Level One 6L80 Rebuild: All the Must Haves for Your Transmission!
  21. NickTransmissions

    2004 Yukon 4l60e

    All things equal, falling out of 4th or no upshift to 4th is typical of failing 3/4 clutch pack, especially if there are no codes and no prior issues. Drop the pan and see what’s at the bottom. If the bottom is full of burnt clutch matter, put the pan back on with a few bolts and yank it for...
  22. NickTransmissions

    Transmission Rebuilders

    Hi Glenn, I’ll send you a PM.
  23. NickTransmissions

    Transmission gave up

    @Meathead16 - will send you a PM.
  24. NickTransmissions

    No R or 1st

    Here's a 4L60E video for a similar situation (check balls getting stuck/wearing or migrating):
  25. NickTransmissions

    No R or 1st

    Drop the valve body and check to see if the #1 and/or #5 check ball have worn and migrated out of position. My video explains: 6L80 No Forward No Reverse Check the Check Balls #automobile #transmissionrepair #6L80

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