Quote:
Originally Posted by Kat
Yep, what he said. 93 is when they started using the PCM to calibrate the speedometer. Before that, you must change the speedometer gears on the tail shaft.
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As far as I know 94 and on is adjustable through the PCM. 93 autos need the gear change in the trans. and 93 manuals need a calibration box like SLP use to sell. The Dakota Digital box is also used with good results. This all applies to the 4th gen V8, I don't know about any other model. It may apply to the 93 Y body as well.