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GMC
Sierra
Drivetrain
Transmission
Symptoms
Not Shifting
Transmission not shifting from second to third gears
1990 GMC SIERRA
162,000 MILES • 5.7L • V8 • 2WD • AUTOMATIC
FEEZO34
MEMBER
1 POST
Shifts from first to second then when it should go third gear it just spins RPMs.
Oct 18, 2021 at 5:06 PM
ASEMASTER6371
✓
Experienced Mechanic
52,796 POSTS
Good morning,
This sounds like the third clutches or direct clutches are worn out and cannot apply to move the truck.
https://www.2carpros.com/articles/automatic-transmission-problems
You will most likely need either an overhaul or a replacement of the transmission.
https://www.2carpros.com/articles/how-to-remove-an-automatic-transmission-rwd
Roy
Oct 18, 2021 at 7:38 PM
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