Alright fellas.Trucks been in and out of the shop for 2 weeks now. Grenaded my TC , so the tranny shop went through everything and replaced TC. Now....... everything acts just fine till I get to cruising speed. Tow/Haul light flashes.. TC wont lock. Getting p1744. Data logged with AE. Says TC unlocked due to slippage. Mind you , new TC, solinoids, and a whole list of other sensors. Shop is stumped. They have just been taking shots in the dark. The guy that built my tranny to begin with doesnt work there any more... go figure....its under warranty.. so I feel like THEY should fix it not me. I just dont have time to let them sit there and continue to not know what there doing with my truck. I can do thatLOL. So here I am .... armed with my laptop...AE.... and a little time. Point me in the right direction. Its next stop is the dealership. There dime of course. Unless it turns out to not be tranny related... ie pcm or something like that.