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08-07-2002, 10:34 AM
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#12 |
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Junior Member
Join Date: Mar 1999
Location: Ventura, California
Posts: 8,981
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Okay. First of all, changing tire size will affect the speedo accuracy on any vehicle. So will changing the rear gears. Older vehicles corrected a rear gear swap by changing the speedo cable gear, but digital speedos have no cable or gear. As mentioned, they are run via the VSS (Vehicle Speed Sensor) in the rear end and the PSOM (Programmable Speedometer/Odometer Module). If the rear gears are changed, the PSOM needs to be reprogrammed, or the speedo will be off. This is extremely difficult in the 2002 vehicles, and to my knowledge can only be done at the dealer.
Take care, ~Chris
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