After driving at 70 for 5 miles transmission shift 1-2 hard like a race car. TPS??
Mar 26, 2021 at 11:41 AM
Transmission shifts hard
2003 CHEVROLET ASTRO
JANDC
- MEMBER
- 5 POSTS
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ASEMASTER6371
- ✓ASE Certified Mechanic
- 52,796 POSTS
Good evening,
The TPS controls shift time, not shift quality. That is mechanical from the valve body.
https://www.2carpros.com/articles/automatic-transmission-problems
I would start by changing the fluid and filter and see if that helps. Beyond that, it is the valve body itself that may have a broken accumulator spring.
https://www.2carpros.com/articles/how-to-service-an-automatic-transmission
I attached a picture of the location of the spring.
Roy
The TPS controls shift time, not shift quality. That is mechanical from the valve body.
https://www.2carpros.com/articles/automatic-transmission-problems
I would start by changing the fluid and filter and see if that helps. Beyond that, it is the valve body itself that may have a broken accumulator spring.
https://www.2carpros.com/articles/how-to-service-an-automatic-transmission
I attached a picture of the location of the spring.
Roy
Image (Click to enlarge)
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Mar 26, 2021 at 3:55 PM
More info: after parked for hour or so then transmission shifts normal.
Mar 27, 2021 at 5:34 AM
ASEMASTER6371
- ✓ASE Certified Mechanic
- 52,796 POSTS
Okay, then it is something with the valve body.
Start with the fluid change.
Roy
Start with the fluid change.
Roy
Mar 27, 2021 at 5:35 AM
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