1990 chev van speedometer

Tiny
1990DUTCHVAN
  • MEMBER
  • 1988 CHEVROLET VAN
  • 2WD
  • AUTOMATIC
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.
Tuesday, February 1st, 2011 AT 2:38 AM

1 Reply

Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
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.
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Tuesday, February 8th, 2011 AT 1:53 AM

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