Well he does'nt know a thing about how gears work if he said that. Maybe the chip is to correct your speedo. I don't have one because mine is still run by a gear in the trans. All you need is a speedcal to change your speedometer. I did all the work on my car, and I replaced all my bearings. It's not a bad idea to change your pinion bearing when it's already apart. I would still go with 4.30's unless you go on long trips. But thats me, I know they do good work there maybe you should talk to another guy. If not try some of the other places I mentioned. Good luck.
Will
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SOLD!!!
98Cobra Black on Black Coupe
4.30's
DTS diff cover
Eaton posi
Moser 31 spline axles
Spec Stage 2 clutch
B&M Ripper shifter
BBK off-road x-pipe
Steeda pullies
Steeda timing adj@14deg
MAC cold air
Best Time
12.9 @107.5 on street tires
New Car 03 Cobra
Not Stock
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