There is a cable running from the throttle to the transmission. That cable is responsible for letting the transmission know when to shift based on throttle postion. Sometimes they go out of adjustment and mess up the shift points on the transmission.
Here are some adjustment instructions I found on the web:
1. While the engine is off, lift tab up to unlock adjustment assembly.
2. Have someone floorboard the accelerator pedal from inside the vehicle.
While the pedal is floored, push on the throttle body arm to make sure it's bottomed against its stop (wide open). (Adjust throttle cable, if necessary).
3. While the throttle is floorboarded, lock the tab on TV adjuster.
4. Make scratch with hacksaw blade or knife up tight against the adjustment assembly. This is the MAX TV mark.
5. Unlock the tab and slide housing towards bare cable 5/16" and lock tab. You can use a 5/16" bolt as a gauge. Make another mark up tight against adjustment assembly. This is the MIN TV mark.
6. Make another mark midway between MAX and MIN. This is MID-mark.
7. Adjust to MID-mark CI and road test.
HIGH OUTPUT Port injection models: Start with setting just a hair over MID
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Tuesday, June 26th, 2007 AT 10:33 AM