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Chevrolet
S-10
Drivetrain
Transmission
Symptoms
HARD SHIFT
Transmission shifting hard
1990 CHEVROLET S-10
200,009 MILES • 4.3L
BETTY LOUISE RATCLIFF
MEMBER
1 POST
What are the most likely causes for my truck to start shifting hard?
Jul 9, 2018 at 3:58 AM
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ASEMASTER6371
✓
Experienced Mechanic
52,796 POSTS
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 4:04 AM
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