1-2 Shift Accumulation

WARNING: This page is about a different car, the 2011 Cadillac DTS. However, it is still accessible from the selected car via links, so may be relevant.

1-2 Accumulator Piston

Second clutch fluid actuates the 1-2 accumulator piston. The fluid then forces the piston to move against spring force and 1-2 accumulator fluid on the opposite side of the piston. 1-2 accumulator fluid is then forced back through its circuit to checkball #2.

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

The #2 checkball is located in the accumulator housing. The checkball is unseated by 1-2 accumulator fluid. This allows the fluid to enter the primary accumulator circuit. Primary accumulator fluid is then routed to the 1-2 & 3-4 accumulator valve.

1-2 & 3-4 Accumulator Valve

The 1-2 & 3-4 accumulator valve is biased by torque signal pressure and by orificed primary accumulator fluid. The valve regulates the exhaust rate of the 1-2 accumulator fluid during a 1-2 shift.