I have a 97' F150, V6, with 63k miles, a month ago when I slowed down to just under 20 miles per/hr, I felt the tranny shift back and forth from 1st to 2nd several times. I got a check engine light and it scanned a PO750 code (Shift Solenoid A Malfunction). I had a locate transmission shop replace the A and B solenoids and also the fluid, but the same problem returned after three days.

The problem only happens when I slow down to under 20 miles per hour and maintain a steady speed between 15 and 20. If I slow down to a stop it appears to complete the downshift correctly.

Can anyone give me some help regarding what may be the fix for problem.

robertjd