Possible TPS Problem

tomkilby

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I have a 98 12 valve auto, it shifts fine through all four gears, but when it gets ready to lock up the torque converter, it downshifts back to third and then goes back to 4th and then finally locks up. It only seems to do it under light throttle application, works ok if I am on it. Truck has 160,000 miles trans has about 80,000 on rebuild. Lockup normally occurs aound 35mph with light throttle.

Does this sound like the TPS, or do you guys think maybe internal problem. I did check the tv cable and it looks to be adjusted properly.
 
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