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Transmission

Tiny
CHARLIE SCANDIFF
  • MEMBER
  • 1998 BUICK SKYLARK
  • 3.1L
  • V6
  • FWD
  • AUTOMATIC
  • 120,000 MILES
No slipping, shifts good, been doing this for at least 20,000 miles. It shifts from first into second at twenty seven mph from second into third at forty seven mph and third into fourth (over drive) at sixty seven mph. Once it makes a shift It stays in that gear until you go fast enough to hit those next speeds (twenty seven, forty seven, and sixty seven mph).
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Friday, September 15th, 2017 AT 7:31 AM

1 Reply

Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 47,526 POSTS
Do you have a check engine light on? If so please follow this guide to read the codes.

https://www.2carpros.com/articles/checking-a-service-engine-soon-or-check-engine-light-on-or-flashing

If not then it sounds like you have a partiality blocked exhaust system which will alter the vacuum the engine creates which fools the computer to think you are always going up a large hill.

Here is a guide to help you confirm the problem.

https://www.2carpros.com/articles/how-to-test-a-catalytic-converter

Please let us know what happens and upload pictures or videos of the problem.

Cheers, Ken
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Saturday, September 16th, 2017 AT 7:25 PM

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