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thom71gt

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  1. thom71gt
    Conditions where it is hot and humid most of the time, apparently broke down the viscosity of the fluid put in and it created a shudder in the torque tube. Replacing the tranny fluid with the new thicker kind, eliminated this problem. I live in GA and it was exceptionally hot this year with a majority of the time it being in the 90's and the "feels like" temp over 100. I have a 16 Yukon Denali with the 8 speed and it drove like crap. Once they swapped out the fluid, it's been driving brilliantly.
  2. thom71gt
    Based on the fact that you have a snow plow on the front, you probably do not experience the shudder as it has mainly effected vehicles in hot and humid climates where it is hot most of the time.
  3. thom71gt
    I bought my 2016 Yukon Denali in April of this year and the Shudder appeared not long after. After doing the research, I contacted my local dealer and forwarded them the service bulletin. They drove it and determined that it was indeed the shutter. They replaced the fluid for no charge and it's run like a champ ever since. Glad I did my homework.
  4. thom71gt
    My GMC Yukon Denali is at the dealer for this very problem. Here is the problem and the fix. This effects vehicles in hot and humid climates. The tranny fluid gets water in it which causes a torque converter shudder. Mobile 1 created a new transmission fluid to specifically fix this problem. Here is the service bulletin and part number for the new synthetic fluid. The bulletin was 18-NA-355 and the part number was 19417577 https://gm-techlink.com/?p=11127
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