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this may be a stupid question, but here it goes. i was thinking of changing my rear dif to maybe a 3.73 or a 3.55 gear. do i just change the ring and pinion, or do i have to change everything in the rear end. 88 cv 5.0L. any ideas?
thanks Adam
 

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All you have to do is change the ring and pinion and get an install kit too. But if you are going with that type of ratio I would think about putting a posi in at the same time. And I would have a pro do the job because the gears have to be timed just right.
 
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