'99 Chev Malibu, 3.1 v6, 4T40-E four speed auto tranny, 173,000 km (108,000 miles).
About once every month or two, when shifting from reverse to drive, there is a delay of a few seconds before forward 'engages'. This been happening since the car was new.
No abnormal debris in the pan. Fluid level is correct. Fluid & filter changed regularly. No codes in the PCM. No abusive driving and/or teenagers involved.
Transmission operates flawlessly, except for this one occasional 'annoyance'. I'm stumped. Ideas, gentlemen??