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

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: 174,001 (100,000–250,000)
Drive Trains affected: 2WD, 4WD
6 model years affected: 1990, 1991, 1992, 1993, more1994, 1995
16 people reported this problem
7 people shared problem details
1990 Toyota Pickup- 2WD218,000
Sometimes drives ok, shifting late, or not shifting above third. Other times it won't shift beyond first. Added transmission seal repair, and this seemed to help for a week or so. It's being worked on right now and the kickdown cable is locked in position. We shall see ...
1992 Toyota Pickup100,000
1992 toyota pickup has trouble shifting to and or will not shift into high gear
1991 Toyota Pickup- 2WD200,000
Shift solenoid #2 was dead. Shift solenoid #1 was intermittently going bad.
Transmission will not downshift when depressing the accelerator on the highway, or when going on a slight incline at a speed higher than 30 miles per hour. I have to manually drop the transmission from D to 2 in order to accelerate when not on the Highway, and I have to disengage overdrive while on the highway. I intend on replacing the shift solenoids and installing a performance kit in the valve body to remedy the problem. If I absolutely need to, I will replace the TPS (throttle positioning sensor) and have it calibrated (although from what I understand it is a simple open circuit, closed circuit switch and not a proportional switch as the ECM, EFI, and control system is somewhat obsolete).
1994 Toyota Pickup- 2WD114,000
Won't shift unless let off the pedal..
1991 Toyota Pickup- 4WD
Will not work in reverse unless I'm in 4low then it's jerky and not much power
1990 Toyota Pickup- 4WD250,000
wont shift into drive. works fine in 2 and 3rd
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