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Thread: Whats wrong with my 4l80e???

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  1. #1
    Join Date
    Nov 2003
    Location
    Denton Texas
    Posts
    20,540
    Check the temp of the trans fluid when it does that. An infrared temp gun would be helpful, just shoot the bottom of the trans pan. A lot of times when you have hard shifting its tied to a bad TPS or a short in the TB harness at the TB.
    See my truck data in the "My Garage" section here... http://www.ls1truck.com/forums/my-ga...tml#post191709

  2. #2
    Join Date
    Nov 2011
    Location
    NH
    Posts
    109
    sorry to sound dumb but whats all those mean lol i dont know squat about trannys.

    Whats a DTC allen??

    and whats a tps throttle pos senser?? or a tb ??
    thank guys for the help.
    is it possible to over heat with a cooler if theressome thing wrong with te tranny itself?? ithink i have a 10 x 15 inch cooler.

  3. #3
    Join Date
    Nov 2011
    Location
    NH
    Posts
    109
    also on my first tune you did allen we tried the retune because of the shifting porblem. but when we did the retune the shifting never changed... it was the exact same bfor and after . so maybe i have a shift kit or a rebuild is in order... its just been problem after problem with this thing!!!

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