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Attention: TDR Forum Junkies
To the point: Click this link and check out the Front Page News story(ies) where we are tracking the introduction of the 2025 Ram HD trucks.

Thanks, TDR Staff
  1. J

    Speedometer Calibration

    My 97 RAM 2500, 4x4, cummins, 5speed, has 411 differentials. I want to raise the effective ratio by going to Alcoa 8" aluminum wheels and 285/75 x 16R tires. Can anyone tell me how to recalibrate the speedometer to match this tire size. I have had the dealer research this and they say that only...
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