transmission

  1. C

    2018 Premier w/transmission issues.

    I bought this 2018 Tahoe Premier in August of this year, w/94k on the odometer. The Chevy dealer gives a lifetime warranty on engine and transmission on all vehicles under 100k. Carfax showed that the previous owner had the transmission replaced in June of this year. So I figured with the new...
  2. Scrappycrow

    Transmission Cooling Line Retaining Clips -- Which Brands & Part Numbers Work?

    Y'all, After a long day of wrenching, one of the last items to do was reconnect the transmission cooling lines to the radiator, but one of the retaining clips went "BING!" and shot off somewhere in the engine compartment. 45 minutes of looking in every nook and cranny, doing lots of...
  3. C

    2017 Yukon Denali Shudder Problem

    Hey there, I picked up a 2017 Yukon Denali with 60k miles on it from Carmax two days ago. I didn’t notice it during the test drive, but I’m experiencing a shudder that feels like driving over rumble strips. I went back to Carmax yesterday morning, and they knew exactly what I was talking...
  4. L

    Major upgrades GMT800, 06ish XL 2500

    Newbie here. Gonna buy 2003--2006 Yukon XL, SLT W/ 8.1. Once rig here, one of the big "to do" on bucket list is upgrade tyranny to best there is. Forgive my Naiveté as relates to engine/tranny/rear end. But would it be possible to upgrade from 4 speed to like a 5-6 speed, ie 6L90 ? If I...
  5. 2

    Please help

    My wife was driving my 2001 Tahoe to pick up her grandpa, she picked him up then she said it was like it went into neutral… No grinding noises or anything. I got it towed home and found out It won’t even go in reverse. The transmission has good fluid… I don’t know what could have happened can...
  6. J

    2021 GMC Yukon Denali Oil Burn

    I've got a 2021 GMC Yukon Denali with 85,000 miles and just had a notification pop up on dash about low oil. Oil Life Gauge has me at 38% life remainging still. Checked the dip-stick and was bone dry. Any thoughts on why this could be burning almost 40% oil? Put 2 quarts in it to get me by until...
  7. T

    14 LTZ Shutter/shake/ vibration under light throttle

    Hello all, first post here, I’ve been here awhile tho! I have a 14 Tahoe LTZ with 101k, I just had the 100k service done, spark plugs/ wires, transfer case and differential, as well as torque converter replaced under warranty due to the shutter/ shake, two different shops confirmed this...
  8. MrShmack

    Brakes and possibly transmission issue?

    Seeking some advice on a few issues with my “new to me” 2003 Tahoe. There seems to be an issue with the brakes where when I’m driving the brakes like to get hard and pulsate almost but will eventually get soft and compress all the way down. I have done a little research on the forums already and...
  9. S

    2022 Tahoe RST Reduced Acceleration Drive with Care - Valve Body?

    Hi All - Last week driving my 22 Tahoe RST with 30,615 miles at about 30 mph, my engine light started flashing and then went solid, and the message "Reduced Acceleration Drive with Care" message came on. I had about 7 miles left to get home and couldn't go higher than maybe 25mph, with the...
  10. E

    2016 Yukon Denali weird stuff, sketchy gm dealer

    Hello, please help. lol. I am new to the forum and I own a 2016 Yukon Denali with the 6.2 engine. 124k miles. My issues started out relatively small it seemed, I had the unfortunately typical hard shifting and delayed shifting going on (mostly into second gear). Engine light comes on. I take it...
  11. Y

    2014 Tahoe transmission

    Hi all, I have Tahoe 2014 with 6L80 Base on this website transend.us, I don’t know how I can verify it. The transmission is slipping and I have been told by transmission shop that it’s the torque convertor. I drove it home and I got the code P0797-00, should I try to replace the convertor if I...
  12. P

    2020 tahoe 6.2L 4x4: fluid changes and drivetrain components

    i've recently taken over maintaining our family 2020 tahoe 6.2L 4x4 premier with 72k miles, and i am preparing to repair a leaking front differential pinion gear seal and change the fluids on the transmission, differentials and transfer case. however, i am having trouble nailing down exactly...
  13. K

    Buying 06 Z71 in limp mode because of leak from transmission to transfer case?

    I am considering buying this 06' with the issue above. He tells me that it is in limp mode and will only drive to 2nd/3rd gear and he had to flutter the gas and coast. He tells me that Firestone said it is a leak from the transmission to transfer case, and it needs to be sealed. he said adding...
  14. U

    2016 Burb - New Built 6L80 and Circle D Converter going In Soon

    This Wednesday. Installing my rebuilt 6L80 and Circle D converter 1800-2000 stall with Penzoil Platinum full synthetic LV ATF. The builder said my 4-5-6 clutch was smoked and there was slight scoring on the pump. He rebuilt the trans, gave me a new pump and installed some Sonnax upgrades that...
  15. U

    Circle D TC 1800-2000 or 2200-2400 Stall ?

    2016 Chevy Suburban -Diablew Tune Only -Superior Transmission cooler bypass -112k miles -Tow a boat in the summer I need to replace my TC and most likely Transmission and I wanted to ask and see what everyone thought about a higher Stall speed? Circled D on the phone recommended the "GM 300MM...
  16. Justinthewoods

    Transmission is slipping on my 2010 Tahoe, going to get a rebuild need some advice

    Hey y’all, I’m having slipping in 3rd and 4th on my 2010 Tahoe LT and am going to have my transmission rebuilt and have my engine mounts changed out. Found a shop near me that has been in business since 1980 with 500+ reviews on google with a 4.9 rating. I shopped around on the quote they...
  17. J

    Tuner to fix shifting in 2000 Tahoe (auto transmission)

    My mechanic recommended I get a "tuner" to fix the weird shifting I'm getting in my 2000 Tahoe. I'm looking for advice on which device, and how to make the settings I need. Issue Details: I had my automatic transmission rebuilt about 6 months ago. It works great 80% of the time. Sometimes it...
  18. C

    2017 Tahoe Sudden Transmission Issues

    I bought my wife a 2017 Tahoe about 4 years ago. It was just over the warranty limit on the garbage AC when I bought it (IDR if that was 75k or 80k miles). Other than the garbage AC it has been a great vehicle until today. It's our everyday vehicle for anything we do together as a family. So...
  19. Hashiriya

    13 yukon Denali new owner drivetrain questions

    Hello, just a few question. 13 Yukon Denali 6.2 awd. What transmission are these equipped with? I’ve done some research and I want to say it’s a 6l80 but I could be wrong. Also. At 120k miles, I want to do a drain and refill of the trans fluid. Called the dealer when purchased and they had no...
  20. M

    OBS 4x4 Transmission interchange

    Howdy ya'll I have a built transmission in a 1999 2 door tahoe with a manual transfer case. I'm looking to buy a 1996 2 door that has the electronic transfer case. Can I swap my built transmission into the 96 with the electronic transfer case? My reason for swapping the transmissions is that the...
  21. H

    2022 Denali transmission

    Hi guys, long story short, 2022 Denali, 6.2, runs great, shifts fine, UNTILL I give it the juice. If I'm at lower speeds and hit it, the trans feels weird , like it's bumping or almost slipping, does it 80 percent of the time, normal city driving it seems fine, but when I punch it to get on the...
  22. D

    Dealer overfilled Trans Fluid

    Hey All, I have a 2013 LTZ with Max Trailering. Just had the trans flushed at 60k and the dealer charged me for 16 quarts which seemed like too much. They claimed that’s what it takes on the 6l80 but everything I can see is 10 for flush, 12.4 capacity but I did see one guy on a forum saying...
  23. M

    2015 Suburban-Periodic rear end rumble strip sensation at highways speeds, between 1k-2k rpm

    Same feeling when you drive over a "rumble strip" on the highway occurring at highway speeds. The sensation feels like it is coming from the rear of the vehicle, will last for a second or two along with a rpm drop of about 100-250. This will repeat rhythmically sometimes, and randomly at times...
    • montcrw15
    • Thread
    • abnormal shifting engine highway speed rpm drop rpms rumble shifting transmission
    • Replies: 3
    • Forum: Engine & Drivetrain
  24. iboughtatahoe23

    Intermittent click form 2nd to 3rd gear

    starting to hear a click or like tap noise when shifting 2nd to 3rd? I can hear it when I’m driving with the windows down. Has anyone ever heard this.
  25. T

    6l80 flares, thunks cold upshifts

    I’ve read thru the 6l80 threads but haven’t seen anything exactly like what I’m seeing with my 2009 Yukon Denali XL. The truck has just under 164k miles. 1. When cold and under light throttle or if I have to lift throttle slightly just before a 1-2 or 2-3 up shift, the transmission will shift...

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