Fluid Pressure is Directed to the 1-2-3-4 Clutch and the Low & Reverse Clutch to Provide Engine Braking

Manual Valve 

The manual valve is moved to the Drive (D) position and allows line fluid pressure to enter the drive fluid circuit. Drive fluid is then routed to the clutch select valve 2.

Clutch Select Valve 2 

Drive fluid at the clutch select valve 2 passes through the valve and enters the drive brake circuit. Drive brake fluid is then routed to the clutch select valve 3.

Clutch Select Valve 3 

Drive brake fluid at the clutch select valve 3 passes through the valve and enters the Drive B fluid circuit. Drive B fluid is then routed to #1 ball check valve.

#1 Ball Check Valve 

Drive B fluid seats the #1 ball check valve against drive 1-6 fluid to force drive B fluid into the 2-6/1-2-3-4 feed passage. The 2-6/ 1-2-3-4 feed fluid is routed through orifice #31 and, to the 2-6 clutch regulator valve. The 2-6/1-2-3-4 feed fluid passes through the 2-6 clutch regulator valve and enters the pressure Switch 3 (PS 3) fluid circuit. PS3 fluid is then routed to the normally closed pressure Switch 3 and opens the switch.

#6 Ball Check Valve 

2-6/1-2-3-4 feed fluid unseats the #6 ball check valve allowing 2-6/1-2-3-4 feed fluid to enter the 1-2-3-4 clutch feed circuit. The 1-2-3-4 clutch feed fluid is routed through orifice #25 and then to the 1-2-3-4 clutch regulator valve.