Transmission not shifting properly

SPANKBOY328

MEMBER
1997 CHEVROLET 1500
5.7L
V8
2WD
AUTOMATIC
60,000 MILES

Used transmission has been in truck for a year and a half. No problems. Took a trip from Houston to Dallas no problems until on the way back. About a hundred miles from Houston stopped for gas. When getting back onto freeway transmission would not shift into overdrive or high gear. Shifts through all other gears okay.

1 Reply

ASEMASTER6371

MECHANIC
52,797 POSTS

Good morning.

First, is the check engine light on?

When was the last time you changed the oil/filter in the transmission? A partially clogged filter would make this happen.

Beyond that, it could be valve body, or internal issue.

Roy

https://www.2carpros.com/articles/automatic-transmission-problems

https://www.2carpros.com/articles/how-to-service-an-automatic-transmission

Transmission not shifting properly

1 Reply

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