TSB# 97-11-11 for 4R70W tranny states. Erratic or prolonged 1-2 shift.
94-97 Mustang and others. Replace the cast aluminum piston with the one piece stamped steel piston with bonded lip seals and replace the top accumulator spring. This is due to 1-2 accumulator bore scuffing the revised piston can be used in the scuffed seal bore.
Don't know if this pertains to you or not. What speeds are involved?
Monday, February 18th, 2008 AT 8:03 AM