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Originally Posted by richy351
can anyone tell me if a normal machanic can perform a ratio change from3.89 to 3.50 or should it be done by a diff guy.
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take it to a diffman if you are not sure,alot of mechanics can do them,but these days it is not a common repair in a shop. we do them but not often.i think it would also be cheaper to use a diffman as he is better tooled up for the job