Question about Pontiac Grand Prix
Tire size been changed, different transmission or differiential changed is the most common cause for that. If that's the case and you can find what the changed item came out - make, year, model, etc. and get the gear off the end of the speedometer where it goes into the transmission and put it in yours it should work ok. You have a different gear ratio and have to compasate for it with the speed o meter gears.
Posted on May 22, 2011
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Posted on Jan 02, 2017
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