K 1500 Truck 4WD V8-350 5.7L (1986)
Accumulator: Description and Operation
1-2 Accumulator
The 1-2 accumulator charges the rear servo accumulator in 1st gear in preparation for the apply of the intermediate clutch on the 1-2 shift.
On most models the valve train consists of a 1-2 accumulator valve and 2 springs. The 1-2 accumulator oil pressure controls application of the
intermediate clutch to obtain smooth shifts.
On other models the valve train consists of a 1-2 primary valve and spring, a 1-2 accumulator valve, spring and plug. The 1-2 accumulator oil pressure is
a two-stage pressure to obtain greater flexibility in obtaining the desired curve for various engine requirements. Regulates drive oil to a proportional
lesser value, that increases as modulator pressure increases, to control engagement of the intermediate clutch.
