6l80 transmission

  1. E

    HD towing package on my 2017 - transmission replaced - does HD part# matter?

    just had the 6L80 replaced with a rebuilt.... 120k miles. Our 4WD 2017 has the HD tow package (RPO code: NHT)... my understanding is the 6L80 tansmission is actually a different part number than the standard 6L80. I'm not sure the difference, but seems to me it's the cooling fluid is routed...
  2. H

    Intermittent loss of power/gears

    Is this a torque converter whine? I have intermittent loss of power and gears.. sometimes drives and shifts fine.. other times it will lose all gears simultaneously. When it does this, I can turn the truck off and back on, and it will shift fine. Very frustrating and I cannot seem to find a...
  3. G

    6L80 trans issues, 2011

    Aamco just put a “new” transmission in for me. Ive had the truck (2011 tahoe) back for 12 days and am having issues similar to when i dropped it off at aamco. I drive in atl traffic daily, it sometimes hard shifts, lurches when costing at low speed, 10-20 mph in first gear, and the temp seems to...
  4. denalilex

    INPUT ON TRANS PAN DROP, FILTER, GASKET & FLUID CHANGE

    input on trans pan drop - complete fluid flush - filter, gasket & fluid change on high mileage vehicles ? (GMC YUKON DENALI 6.2L v8, 6L80) when i was checking my fluids yesterday - trans looked a little high… siphoned some out & it was like black tar. i know sometimes it’s advised against to...
  5. 96impalaSS

    6l80 Transmission

    As I was driving my truck it stopped. It doesn't go reverse it doesn't go forward so I pull down the transmission to check the the clutches and found out the some was bad I replaced the ones that was bad, out the transmission back together and put it back on the truck, and still nothing. I had...

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