Accumulator

AUTOMATIC TRANSMISSION - 42RLE

ACCUMULATOR

DESCRIPTION

Fig. 144 Underdrive and Overdrive Accumulators:

The 42RLE underdrive, overdrive, low/reverse, and 2/4 clutch hydraulic circuits each contain an accumulator. An accumulator typically consists of a piston, return spring(s), and a cover or plug. The overdrive (1) and underdrive (2) accumulators are located within the transmission case, and are retained by the valve body (Fig. 144).

Fig. 145 Low/Reverse Accumulator:

The low reverse (1) accumulator (Fig. 145) is also located within the transmission case, but the assembly is retained by a cover and a snap-ring.

Fig. 146 2/4 Accumulator Assembly:

The 2/4 accumulator (5) is located in the valve body It is retained by a cover and retaining screws (Fig. 146).

OPERATION
The function of an accumulator is to cushion the application of a frictional clutch element. When pressurized fluid is applied to a clutch circuit, the application force is dampened by fluid collecting in the respective accumulator chamber against the piston and springs. The intended result is a smooth, firm clutch application.