In May, I finally got the shop to tear into the transmission because it was dropping in and out of 4th gear on the highway. Turns out the torque converter was shot, the valve body was shot and the 4th clutch they supposedly replaced was most of the way stripped. I had them rebuild it (under their warranty since I had been *****ing about it since the day I got it back) and sold the car shortly thereafter. Moral of the story, TEP is the only person that should be rebuilding your transmission. Had I gone that route, I'd still be driving my Monte Carlo...