What color gear do I need in my transmission.

Discussion in 'Original Drivetrain Topic' started by 70Camaro350ss, Jan 15, 2018.

  1. 70Camaro350ss

    70Camaro350ss New Member

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    Dec 3, 2017
    My speedometer drive gear is 11
    my tire size is 215/70r14
    tire diameter is 25.85
    I have a 350 turbo stock hooked to a 3.07 12 bolt open face rear end. My speedometer is showing 20 MPH when I am moving 10 MPH. Need help to correct this.

    V/R
    Jeremy
     
  2. RS1979

    RS1979 Veteran Member Lifetime Gold Member

    3,109
    427
    Jun 18, 2013
    Memphis, TN
    Are you sure the drive gear has 11 teeth? I don't see an 11 tooth drive gear on the TCI chart. Take a look at your gear and see what color it is. Then look at the TCI chart. They have the number of teeth and the color of the drive gear.
     
  3. 70Camaro350ss

    70Camaro350ss New Member

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    Dec 3, 2017
  4. RS1979

    RS1979 Veteran Member Lifetime Gold Member

    3,109
    427
    Jun 18, 2013
    Memphis, TN
    It looks like you’re going to have to change both the drive gear and the driven gear to get it right. Go with a 17 drive gear and a 41 driven gear. This will get you close.
     
  5. 70Camaro350ss

    70Camaro350ss New Member

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    Dec 3, 2017
    How did you get that number? I went to the TCI web page and i got 8 and 19 or 9 and 21.
     

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