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Thread: 95 k1500 Gear Ratio change

  1. #1
    Carb and Points!
    Join Date
    Dec 2014
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    3

    95 k1500 Gear Ratio change

    I have been tuning for many years but am new to this software and can't find where to adjust for a gear change on a 16197427 & $0D mask. Any help would be greatly appreciated.

  2. #2
    Fuel Injected!
    Join Date
    Jul 2012
    Location
    Fresno, CA
    Posts
    422
    Normally you'd make the change by changing the VSSB jumpers. The popular mod is to replace the jumpers with a couple of DIP switches. In other words, you don't normally change anything in the .bin on the 7427. On a '95, the VSSB is underneath the ECM.
    1973 K-5 Blazer, TBI 350, TH400, 1 ton axles & 38" SSRs'
    1975 280Z, TBI 350, 700R4
    1953 M-38A1, TBI Buick 231
    1951 Ford Panel, 5.3 with 4L80E

  3. #3
    Carb and Points!
    Join Date
    Dec 2014
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    3
    Thank you for the reply, I've never performed that mod but my question is will this just correct the speedo or will it adjust the transmission scalers also?

  4. #4
    Fuel Injected!
    Join Date
    Jul 2012
    Location
    Fresno, CA
    Posts
    422
    No, it corrects the signal going to both the speedo and ECM.
    1973 K-5 Blazer, TBI 350, TH400, 1 ton axles & 38" SSRs'
    1975 280Z, TBI 350, 700R4
    1953 M-38A1, TBI Buick 231
    1951 Ford Panel, 5.3 with 4L80E

  5. #5
    Carb and Points!
    Join Date
    Dec 2014
    Posts
    3
    Thank you for your help

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