Coast Clutch Applies

WARNING: This page is about a different variant/trim than selected.

Manual Valve

Mechanically moved through the gear selection, the manual valve allows line pressure to enter the D321 fluid circuit, and the PRDN4 fluid exhausts at the valve. D321 fluid is then routed to the spring end of the 3-4 shift valve.

3-4 Shift Valve

Spring force and D321 fluid pressure hold the 3-4 shift valve in the downshifted position. The 3-4 shift valve allows D321 fluid to pass through the valve and enter the coast clutch feed circuit. Coast clutch feed is then routed to checkball #9.

#9 Checkball (Coast Clutch Feed, Orificed Coast Clutch Feed)

The #9 checkball is located in the valve body, and the checkball is unseated by coast clutch feed. The checkball routes fluid through orifice #7, where the fluid enters the coast clutch circuit. Coast clutch fluid is then routed to the 2-3 shift valve.

2-3 Shift Valve

High fluid pressure at the 2-3 shift solenoid (SS) valve holds the 2-3 shift valve in the upshifted position. This allows coast clutch fluid to pass through the valve. Coast clutch fluid is then routed to the coast clutch piston and applies the clutch.