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    Overfilled or Underfilled Transmission Fluid Causing Poor Shifting?

    Well over those 218k miles on my truck the tranny has been rebuilt twice. I think the fluid is a little over filled cuz I remember I put a bottle of Lucas treatment in it. I dunno what to do. Why with so many miles and doing a flush cause issues? (what kind of issues?)
  2. Z

    Overfilled or Underfilled Transmission Fluid Causing Poor Shifting?

    I have been wanting to change/flush the transmission fluid in my truck for awhile. Ive gone to a few places but they turn me down cuz I has over 100k or 150k miles. So im thinking I should just do it myself but ive heard changing the tranny fluid can make the transmission fail or get f'ed up? I...
  3. Z

    Overfilled or Underfilled Transmission Fluid Causing Poor Shifting?

    Hey, So I have a 97 2dr Yukon GT with pushbutton 4x4. My truck sometimes doesn't seem to downshift very well. If im going 50 and I let go of the gas it seems the truck slows down and doesn't downshift right. Well my question is I have heard having too much transmission fluid in your truck or...

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