Transmission shifting hard

1990 CHEVROLET S-10
200,009 MILES • 4.3L
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BETTY LOUISE RATCLIFF
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  • 1 POST
What are the most likely causes for my truck to start shifting hard?
Jul 9, 2018 at 10:58 AM
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ASEMASTER6371
  • ✓ASE Certified Mechanic
  • 52,796 POSTS
  • ASE Certified Mechanic
Good morning.

Some possible issues.

1. Transmission fluid dirty and filter clogged.

2. TPS sensor voltage not correct giving wrong shift points.

3. Shift vales in the valve body sticking from dirt and debris.

4. Accumulator springs broken.

All these need to be checked.

Roy
Jul 9, 2018 at 11:04 AM
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