Erratic Shifting of the Automatic Transmission on Pontiac Grand Prix GTP

The transmission pressure control solenoid may fail causing erratic shifting. Our technicians tell us that partial dis-assembly of the transmission is necessary to replace a failed pressure control solenoid.

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Average mileage: 144,828 (132,000–157,657)
3 model years affected: 2000, 2001, 2002
5 people reported this problem
1 person shared problem details
my transmission intermittently shifts hard in all gears.
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