Guys you have to be patient w me on this !! I previously posted about my TC locking up intermittently. I was given several ideas on what to check but honestly I'm not a very good trouble shooter. After driving it for a few weeks now this is what I have discovered. When I first crank it and leave in the morning or after it has set for a long time the TC will lock up every time. However when I slow and it unlocks or I come to a stop it won't lock in again. It's like after it warms up it quits working. Is this indicative of a bad solenoid? I think I could change that out if that's the problem. I just don't know how to trouble shoot electrical problems. Ohmns and stuff. (The code was a PO740 TC solenoid open circuit).