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Thread: Gear ratio change help

  1. #1
    Tuner in Training
    Join Date
    Aug 2010
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    49

    Gear ratio change help

    I went from a 3.82 to a 4.45 ring and pinion in my F35 5 speed 2009 Cobalt SS TC . How do I adjust the speedometer ? Thanks J.R.

  2. #2
    Tuner Sharkey's Avatar
    Join Date
    Sep 2011
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    Abbotsford BC Canada
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    75
    you dont need to. the f35 transaxle reads the vehicle speed off the differential reluctor wheel, that part is not changed in swapping the final drive. most fwd transaxles do it this way. basicly 1 turn of the tire is 1 turn of the differential no matter what final drive ratio you have.

  3. #3
    Tuner in Training
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    Aug 2010
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    OK Great. Thanks