Erratic Shifting of the Automatic Transmission on Buick Riviera

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: 149,000 (112,000–190,000)
3 model years affected: 1997, 1998, 1999
10 people reported this problem
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problem details
1998 Buick Riviera 112,000 mi,
Sometimes it shifts like it has a shift kit in it and other times its super smooth.