Changing gears - Speedometer Recalibration - Ford Mustang Forum
 
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post #1 of 3 (permalink) Old 06-28-2012 Thread Starter
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Changing gears - Speedometer Recalibration

It looks like my speedometer will need to be recalibrated after switching from 3.31 to 3.73 gears. Will the ford racing tuner take care of this or do I have to go aftermarket?

If aftermarket, which is the best/most reliable tune out there? I'd like to keep this car as close to stock as possible for warranty reasons.

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post #2 of 3 (permalink) Old 06-28-2012
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Yes, with the ProCal tuner (FRPP)...you will be able to adjust the speedometer setting for the new 3.73 gears. Get the FRPP tune if the extra low end torque (seat of the pants fun factor) and warranty is what you are looking for.

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post #3 of 3 (permalink) Old 06-28-2012
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You don't actually need a tuner to do this. If you just want the speedo to be correct without modifying the calibration or getting into all that, any dealer can change the gear ratio or tire size with the factory IDS scan tool. It's a simple parameter change.

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