Transmission will not move in any gear after it warms up

2001 GMC SIERRA
178,000 MILES • 5.3L • V8 • 4WD • AUTOMATIC
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CLAMPITT
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  • 1 POST
When the transmission is cold, it will go into gear, forward and reverse. After it warms up, it will not move in any gear, rpm's are up, vehicle not move. The electronic four wheel drive activates as you can hear the solenoids click. Fluid level is good. What sensor and where is it at that needs replacing?
Nov 9, 2018 at 11:21 AM
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ASEMASTER6371
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Good afternoon.

There are no sensors for application going into gear. that is mechanical.

I would drop the transmission pan and inspect the filter for being clogged for debris. That may be the whole issue.

If that does not do it, then you have an internal failure.

Roy

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

https://www.2carpros.com/articles/how-to-service-an-automatic-transmission
Nov 9, 2018 at 1:02 PM