Over-filled transmissions can act up because when they are too full, the fluid gets air whipped into it. An automatic works on Hydraulic pressure and air in the oil can cause the pressures to drop. Pull the drain plug on the bottom of the pan and set the level.

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My Truck.. 2007 DODGE, 5.9 Cummins, 6spd stick, 4X4. My car..1977 240D, OTHER WHEELS...1955 VW Oval window bug, European Delivery (Holland) with a 1700cc, 2 barrel, Porsche drum brakes. 1939 WILLYS Pick-up. 1967 Triumph 200cc Tiger Cub. 1976 Honda 550F 4cyl Motor Cycle.