Automatic Transmission Control Module problems of the 2008 Ford Escape Hybrid

Driving vehicle on interstate highway @ highway speeds. While merging into traffic, experienced abrupt loss of power. Amber wrench warning light came on. Moved to shoulder of road in heavy traffic, stopped vehicle, turned off ignition & after about 30 - 40 seconds restarted vehicle, power restored & vehicle continued to drive normally (wrench light off). Took vehicle to dealer, where throttle body was replaced, not under warranty (despite TSB 09-19-12). On Feb. 3, 2012, experienced similar loss of power problem, and the amber wrench light and master vehicle electrical hazard warning light came on, and vehicle completely shut down (mileage at this point: 45,500 miles). After shutting off the ignition & restarting, the vehicle would run normally for 45-60 seconds, then would fault & shut down. I was close to my workplace, so I limped it back to work. Called dealer, who recommended calling Ford's roadside assistance. Vehicle was transported to hybrid certified dealer, where the throttle body was replaced (under warranty this time) and the pcm was reprogrammed. When I came to pick the vehicle up, I experienced the same loss of power & warning lights (open wrench light). Dealer now claims a sensor in the shift assembly is bad & is causing the problem (claiming this is not covered by warranty). Vehicle is still at dealer at the time of this post.