My automatic gearbox functions correctly when cold, in drivng gear and reverse. After some driving at motor temp of 80 degr C, the forward gears continues to function properly. When shifting in rear, I have to wait for 3 or 4 seconds and then the car will move slowly; it seems if the rear gear is slipping, with almost no power available. I already have replaced the ATF oil and gear box oil filter. Is this a costly problem or can some adjustments be made to the gear box or gearbox servo?
Who can help ?