So I have an 07 with a 5.9 and it's pretty well stock with the exceptions of a intake and straight pipe... My problem is that when I drive and get above 50mph the torque converter locks up like it should... Ok cool... But then when I come to a stop it doesn't always unlock, it tries to kill the truck and then unlocks around 10 or 15mph after it bucks a little bit... No check engine light and no codes... It doesn't always do it but maybe half the time when I got above 50 and try to come to a stop(like when I'm gettin off the highway).... Any ideas??? Big thanks in advance

 

Also if I notice it's going to do it by watching how the rpm and mph come down together instead of the tc unlocking and the rpm falling back to idle, I can tap the gas pedal and it will unlock and not buck when I come to a stop

 

maybe the TCC solenoid? Dont think its the torque itself as usually when the sprag clutch takes a vacation the torque locks and stays that way