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Transmission not shifting properly

Tiny
TODD EMPFIELD
  • MEMBER
  • 1992 TOYOTA PICKUP
  • 3.0L
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 320,000 MILES
Drive does not work to start off, but reverse, first, second work find. And when you get it up to speed drive works but the overdrive light comes on shift it back down.
Wednesday, January 9th, 2019 AT 9:07 AM

1 Reply

Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 47,256 POSTS
Hello,

It sounds like you have a partial plugged catalytic converter which will lower vacuum and cause the transmission is shift late. Here is a guide that will help confirm the issue:

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

Please run down this guide and report back.

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Thursday, January 10th, 2019 AT 12:30 PM

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