Origional problem, ruptured cooler mixed atf and coolant. after flush didnt work vehicle came in w/no movement. all rubber seals were swollen and pistons binding. Overhauled and cleaned vb.First 6-8 shifts cold are great then start firming up to a bang 2-3 shift. Decided internal computer may be damaged by coolant so replaced Valve body new dealer incudes all solenoids and TCM. test drive shows same complaint. any help is appreciated.