Thanks to SC/Alero for helping me troubleshoot this. The fault turned out to be the TP Sensor. It was intermittant at first and the computer diagnostic indicated P1635(5 volt reference circuit out of tolerance), but the next code indicated was P0463(fuel level sensor high voltage), and that threw us off. Fortunately, the TPS finally failed entirely. What I would like to know is, why did it affect the transmission to that degree?
I should also mention that this car is running the supercharger originally from Springs fastest Alero's car (and doing great so far). I am running about 5-7 lbs. boost right now with CAI and water methanol injection, but the car is otherwise completely stock.
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