Tahoe 1998

Discussion in 'The "Juice Box"' started by kack, Jul 18, 2020.

  1. kack

    kack Well-Known Member

    The Speedometer shows 15 Km to much.
    Are there any adjustment to do?
    Or do i need to change Gears in the Transmission. Thanks Goran
     
  2. 436'd Skylark

    436'd Skylark Sweet Fancy Moses!!!!!

    The speedo will be digitally driven. No gears to change.
     
  3. pbr400

    pbr400 68GS400

    What size tires are on it? What size does the door sticker (or other info) say it was built with? How do you know you have an error?
    Patrick
     
  4. kack

    kack Well-Known Member

    Thanks for the information. Goran
     
  5. kack

    kack Well-Known Member

    My Daughter test it with the Phone. Is an App with a Speedometer in.
    I will see what the book say. Thanks Goran
     
  6. kack

    kack Well-Known Member

    The door sticker say: P245/75 R16 S
    The tires on the Car is: 245/75 R16.
    Thanks Goran.
     
  7. pbr400

    pbr400 68GS400

    So the error isn’t from the tire diameter then. Sounds like either the sensor on the transmission is bad or the speedometer (via the PCM) needs to be recalibrated (possibly it was changed for non stock (taller) tires and not changed back?). Here’s another forum’s discussion of the set up.
    http://67-72chevytrucks.com/vboard/showthread.php?t=651002
    Patrick
     
    Last edited: Jul 19, 2020
  8. kack

    kack Well-Known Member

    Iwill take a look on that one.
    Maybe best is to buy a Bicycle Computer, and put beside the Speedometer.
    Thank you. Goran
     
  9. 1973gs

    1973gs Well-Known Member

    Use a scan tool and make sure that the correct tire size is programmed in the pcm.
     
  10. kack

    kack Well-Known Member

    Will see if i can find a Shop with a Scan Tool. Thank you. Goran
     

Share This Page