What am I looking at here?

Discussion in 'Transmissions' started by jasonreichle, Feb 12, 2020.

  1. jasonreichle

    jasonreichle I'm Awesome

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    Looking at buying a 6.5 with a 4l80e. Guy says transmission issues. Says it hunts for gears when you get on the throttle, once your on the highway it locks into Od and cruises perfectly. Truck has a heath tune on it running 15 psi. Fluids clean and always serviced on time. Year is a 98. Truck is an amazing deal otherwise if I gotta throw in a trans I’m not to worried. To me it sounds electrical. TCC solenoid? TPS? Thoughts
     
  2. RDF1

    RDF1 I'm Awesome

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    Hunts for gears could be a tune issue. Or TPS issue telling PCM false info so its shifting at the wrong time.
     
  3. jasonreichle

    jasonreichle I'm Awesome

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    thought I read somewhere 6.5s don’t have a tps? I could totally be out to lunch though
     
  4. PlayingWithTBI

    PlayingWithTBI Desert Old Guy

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    I think it's on the gas pedal.
     
  5. smdk2500

    smdk2500 I'm Awesome

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    It is on the accelerator pedal. When gm went to the ds4 pump in 94 it went to drive by wire.
     
  6. jasonreichle

    jasonreichle I'm Awesome

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    awesome. Now to see if I can pull any codes
     
  7. smdk2500

    smdk2500 I'm Awesome

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    When it is
    when it is hunting for a gear does the service throttle soon light come on? Also if you have a scan tool you can check the voltage reading by depressing the pedal and watch the voltage reading.
     
  8. smdk2500

    smdk2500 I'm Awesome

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