Hi Greg. Had some time to drive the car some moreand test the tranny. You are right, the tranny is not down shifting to 1st gear. That is the cause of the poor acceleration and loss of power.
When the car is cold, the tanny shifts through all three gears, 1st, 2nd and 3rd. But once the car warms up, it will not shift into 1st gear, either manually or automatically.
I tried to read the error codes on the Transmission Control Module with an analogue volt meter, (this is the technique recommended in an automotive manual called "Mitchell On Demand") . I connected the (+) prob of the meter to pin 10 and (-) prob of the meter to pin 12 of the data terminal. It read out at a constant value of approx 5 volts. I even tried to drive the car with the volt meter connected to the data terminal and the reading between pin 10 and 12 was a constant 5 volts. I even tried to cycle the ignition switch on-off, on-off and then on within 5 seconds, and the reading was still 5 volts, (when the ignition is off, the reading is 0 volts).
I did notice one other inconsistent thing about the tranny - With the ignition switch on, engine off, if I shift the tranny into reverse, I hear some type of actuator, or motor, in the tranny run for a couple of seconds and then stop. When I shift into D3, I hear the same thing, (small electric motor in the tranny will run for a couple of seconds and then shut off). When I shift to D2, I hear nothing. But when I shift to D1, I hear the motor run and it does not stop. It just keeps running. It seams like there is some type of electronic actuator/motor that shift the tranny through its gears and for some reason it can not find 1st gear and it keeps running. That may be completely incorrect but it is what makes sense to me at this time.
Could it be the Kick-down Servo? And if yes can it be adjusted, or replaced? If not the Kick-down Servo what else could it be?
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