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'87 Pickup AT Shifting Malfunction
I have an 87 Pickup, 2.4L 22R Eng/2WD with Automatic Transmission. It has a push-button overdrive control.
My problem is that, while the transmission shifts adequately from first to second gear, it is failing to shift from 2nd to third, etc, on its own. One thing I've found is that it can and will upshift or downshift by manually removing my foot from the accelerator. On hills it downshifts with the slightest pressure on the gas peddle (which I assume is normal).
My fluids are up.
It just won't shift on its own. I've tried flooring it and it just goes. I've had the truck going almost 50mph in second gear--not good. However, it does consistently shift into the desired gear when I use the gas pedal trick.
I contacted a transmission shop and they said it might simply be a "control issue." Also, as an aside, I picked up some dialogue from an online forum regarding engine water temperature. I don't know if that is at all pertinent, but the Toyota's temperature sensor is currently faulty and needs replacing.
I'll try to provide more information if anyone asks.