Toyota Pickup Problem Report
Toyota Pickup Automatic Transmission May Not Shift Correctly at High Mileages
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.
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). - paccman1
Won't shift unless let off the pedal.. - Visitor
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