Shift Accumulation

WARNING: This page is about a different car, the 2007 Cadillac DTS. However, it is still accessible from the selected car via links, so may be relevant.

1-2 & 3-4 Accumulator Valve

This valve is biased by the torque signal, the third clutch and the orificed primary accumulator pressures. This valve regulates primary accumulator pressure. Fluid pressure from the primary accumulator is routed to the spring side of the forward accumulator piston, checkball #2 and checkball #3.

#2 Checkball (Primary Accumulator/1-2 Accumulator)

The #2 checkball is located in the accumulator housing. The checkball is seated against the spacer plate in order to route primary accumulator fluid through orifice #14 and to the spring side of the 1-2 accumulator piston.

#3 Checkball (Primary Accumulator/3-4 Accumulator)

The #3 checkball is located in the accumulator housing. The checkball is seated against the spacer plate in order to route primary accumulator fluid through orifice #13 and to the spring side of the 3-4 accumulating piston.

2-3 Accumulator Valve

This valve is biased by the torque signal and by the orificed secondary 2-3 accumulator pressures and the spring force. The 2-3 accumulator valve regulates the 2-3 accumulator circuit pressures. Line pressure at the valve feeds into the secondary 2-3 accumulator circuit and is then routed to checkball #10.

#10 Checkball (2-3 Accumulator)

The #10 checkball is located in the case cover. The checkball is seated against the spacer plate in order to route secondary 2-3 accumulator fluid through orifice #32 and then into the 2-3 accumulator circuit. Fluid from the 2-3 accumulator is then routed to orifice #32 and then to the spring side of the 2-3 accumulating piston.