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I just bought a 95 gt and the speeding is off by about 20mph what could be a possible explanation
 

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Someone has changed the gears or the back tires are a larger or smaller diameter than factory.
 

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My $ is on gears. Mine was off 10-20mph depending how fast I was going and it turned out I had 373's. Good way to find out is jack the reared up. Mark a spot on your driveshaft and a mark on the bottom side wall of your tire. Turn the tire one rotation and count how many times the mark on the shaft rotates. If it's 3 & 3/4 turns you have 373's and so on.
 

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Discussion Starter #5
jhagan1980 said:
My $ is on gears. Mine was off 10-20mph depending how fast I was going and it turned out I had 373's. Good way to find out is jack the reared up. Mark a spot on your driveshaft and a mark on the bottom side wall of your tire. Turn the tire one rotation and count how many times the mark on the shaft rotates. If it's 3 & 3/4 turns you have 373's and so on.
Thanks man I appreciate that ima try it tomorrow
 
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