Trans 2000 lumina

[werre7300]

Transmission started to slip going into over drive and then started to slip in lower gears.............Had an overhauled trans put in and it still slips but only going in and out of overdrive.................Any thoughts.....Doesn't slip all the time either.

[maxwedge]

Have the trans shop check for slippage percentages in lock up/od using a full function trans capable scanner.