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  1. NickTransmissions

    2016 Tahoe Trans failure

    The casualty is usually the front pump, tends to mangle the working surfaces and sometimes breaks the pump rotor. no movement is the result, if the condition didn't already happen due to the converter's stator failing.
  2. NickTransmissions

    GM 6L80 Transmission Information Thread

    Yea, unfortunately you won't get anywhere near the full picture of what's happening and why with just a code grab. P0700 is a generic TCM code that's informing something is wrong...You need a scan tool with live data and two-way comms capability to properly trouble shoot...I'd start watching YRT...
  3. NickTransmissions

    GM 6L80 Transmission Information Thread

    I'm familiar with Snap-On but Autel, Bosch and SPX are also popular. There's various levels of sophistication but bi-directional communication, code reading (including ABS, Chassis codes) and adaptation resets is usually sufficient for most DYIers. Some have wifi connectivity - those are nice to...
  4. NickTransmissions

    Transmission interchagability

    @stevesbermudablue or anyone else reading... While I didn't mention it initially (skipped my mind when arguing with that other poster), you can also tell whether or not a given 4L60E has a turbine speed sensor by looking at the color of the transmission's wiring harness case connector. - The...
  5. NickTransmissions

    Transmission interchagability

    Yep, the 4L60E landscape can be a minefield to navigate when it comes to interchangeability, both in part and as an assembled unit. The Gen3 sbc 4L60Es in the full size trucks/suvs are all largely the same other than the TSS through 2008. In 2009, all 4L60Es underwent significant C3 and...
  6. NickTransmissions

    2007 Yukon. Lost 1st and reverse gears in transmission. Replacement options?

    It could be or it may have been something else not associated with the transmission or t-case entirely. Generally, once the transmission starts grinding, it's not long before it stops working correctly all togther. Obviously, those things dont fix themselves (as much as we wish they did)....If...
  7. NickTransmissions

    Transmission interchagability

    Yep, exactly. I've rebuilt countless 'good used' / transplant 4L60Es that went belly up within 6 months after being installed...I know a rebuild can be out of reach for a variety of reasons but if folks can either save or take on the work themselves, they should absolutely do it. Not sure if...
  8. NickTransmissions

    Transmission interchagability

    He can contact any GM Dealership parts department and give the last 8 of the VIN to confirm/deny his transmission is equipped with a TSS then purchase a TSS-equipped 4L60E. Don't make statements like, "I think most of that is incorrect" then realize you stepped in it. As a certified master...
  9. NickTransmissions

    Transmission interchagability

    So...How many 2000-2013 4L60Es have you rebuilt over the years?? You left this question completely unanswered. Your Saab is in the minority and has a completely different engine belonging to a completely different engine family! Those units are completely different where it counts (as I...
  10. NickTransmissions

    Transmission interchagability

    Pretty Sure??? How many 2000-2013 4L60Es have you built? I've built hundreds over the past 15 years... He has a 2005, per his OP...If his has no TSS, any 2001-2008 V8 300mm input design 4L60E will plug and play. If it does, he's limited to those units with the TSS up to 2009. He can reuse his...
  11. NickTransmissions

    GM 6L80 Transmission Information Thread

    It can be a problem with the shifter itself not communicating to the PCM/TEHCM once you place it into manual mode...The only way to know for sure is to put a scan tool with live data capabilities...Plug the scan tool in, bring up 'Transmission' data then fire the engine up...Note the range being...
  12. NickTransmissions

    Transmission interchagability

    Will not interchange if the envoy has one of those inline 5 engines. Input shaft, bell housing and torque converter are completely different. Any 2000-2008 4WD 4L60E that went in behind a Gen3 small block will work. That said, why not rebuild the one in the vehicle now?
  13. NickTransmissions

    2017 Tahoe LT not shifting into drive

    Probably #1 checkball worn/stuck in the spacer plate. Could also be 1-2-3-4 broken piston (not as likely) or rear sprag but those dont fail too often.
  14. NickTransmissions

    Tranny help

    If your rpms climb high enough in manual low, trans will force an upshift to second gear to protect engine and trans from damage. You need to do a gear command mod, which would give you manual low at any speed and rpm. Transgo reprogramming kits have these mods/parts so install that kit for your...
  15. NickTransmissions

    So this just happened...is it bad?

    Nothing inside the transmission would prevent the engine from turning over or make it any harder to do so than normal as the input shaft/456 clutch drum and clutch pack passively rotates around the 456 hub when engine is running, vehicle is in park or neutral. Voltage irregularities can trigger...
  16. NickTransmissions

    6l80 tcc slip tuning stock clutch

    That's impossible to say unless you either take surveys of sufficient sample sizes to draw such conclusions or the data is already out there, plus you'd have to quantify what it means to 'work harder' to ground the results. Bottom line: they are all prone to the same type of failures, most of...
  17. NickTransmissions

    6l80 tcc slip tuning stock clutch

    You're correct, the 90s are about 4-5 inches longer and those that went into diesel-equipped vehicles had an extra clutch and steel in the packs as well as stronger planetary carrier sets and the TMBX converters they came with had flanged hubs whereas the 80s converters did not. It's a stronger...
  18. NickTransmissions

    So this just happened...is it bad?

    P0796 is a solenoid performance code specific to clutch pressure control solenoid 3 (CPC3 stuck 'off') however much of the time your TEHCM isn't to blame (the solenoids are all housed w/in the TEHCM (transmission electronic hydraulic control module) and cannot be replaced individually. That code...
  19. NickTransmissions

    So this just happened...is it bad?

    Depends on what's triggering it. Could be TEHCM, Valve Body or internal case. Any trans-related drivability symptoms?
  20. NickTransmissions

    Service 80k mile 10 speed or leave it alone?

    Most Autel scan tools are capable of fast adapt/relearns. Same with Snap On, Bosch or AC Delco's TDS system. Id invest in a scan tool. Costs a tiny, tiny fraction of what your vehicle costs and will pay for itself many, many times over the course of your vehicle's expected in-service lifetime...
  21. NickTransmissions

    New Torque convertor now ECM Wont Communicate

    Let it run until it's hot enough then put it in gear to further circulate fluid and top off (just don't try to drive it around) then do the fast relearn. Once the fast relearn executes, take on a short test drive, check fluid after about 500-1000 feet of driving, top off as needed. That's how...
  22. NickTransmissions

    2017 Tahoe 6 speed - question about trans thermostat?

    Flip the pill or install the Superior Tech delete kit as shown in the video above and put on the largest cooler you can fit onto the truck. Route lines through the internal trans cooler and the aftermarket cooler.
  23. NickTransmissions

    New Torque convertor now ECM Wont Communicate

    Vehicle has to be running, transmission to operating temperature prior to beginning the fast adapt relearn procedure for the transmission. Do you have a 'No crank - no start' or is it cranking over but simply not firing up?
  24. NickTransmissions

    New Torque convertor now ECM Wont Communicate

    No, you'll need to fix the comm problem first but not having a capable scan tool handicaps you bigly. I strongly recommend you invest in one so you dont have to rely on other people (shops, etc) to do basic diag and reset functions. Autel, Snap on, Bosch, etc all make them. AC Delco's Technical...
  25. NickTransmissions

    New Torque convertor now ECM Wont Communicate

    You have to do a fast adapt relearn anytime you do anything to the transmission beyond just a fluid and filter change. This includes the torque converter since the computer will adapt to TC degradation that shows up as drivability symptoms and/or anomalous data readings to the PCM. So you will...

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