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1988 Chevrolet Van Repair Question


Topics covered: Dealer, Speedometer.
Mileage: No information provided.

Asked on February 1, 2011

1990 chev van speedometer

I've replaced a 3:52 rear end with a 4:11. What do I need to do to get the speedometer to read the correct MPH? Van has a 5.7 with AT.
Avatar Asked by 1990dutchvan

Answer

Replied on February 8, 2011

good luck on this one, the pcm has to be reprogrammed for the rear end and i'm not sure they will go for that particular rear end. You'll have to contact a dealer and talk to their guy that does the reprogramming. It may not be capable of doing this.

Tiny Answered by hmac300 (expert)
17,808 answers provided