Automatic Transmission May Not Shift Correctly at High Mileages on Toyota Previa

At higher mileages, (125,000-150,000) the automatic transmission may not shift correctly. This can be caused by the throttle position sensor being out of adjustment or a shift solenoid needing to be replaced. Typically the transmission does not need to be completely overhauled.

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Average mileage: 169,571 (120,000–216,000)
Drive Trains affected: AWD, RWD
7 model years affected: 1991, 1992, 1993, 1994, more1995, 1996, 1997
16 people reported this problem
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problem details
1991 Toyota Previa 120,000 mi,
car can't pick-up the speed. it's happen every morning when i drive to work.
1995 Toyota Previa - AWD 216,000 mi,
The L on the shift inidcater lit up and it will not shift out of low gear.
1994 Toyota Previa - RWD 150,000 mi,
ATM warms up and fails to shift. We have replace the speed sensor and rotor sensor but the problem persists
1991 Toyota Previa - RWD 210,000 mi,
p0773 shift solenoid obd trouble code. causing CEL
1992 Toyota Previa - RWD 156,000 mi,
This just started three days ago. It was running and shifting just fine one day and the next, it was having problems shifting, surging. I thought it was cap and rotor, but this may very well be it. I will investigate more tomorrow.