Fluid Pressure Directed in Preparation for a Shift

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Pump Out Fluid Circuit

PUMP OUT (3) fluid from the automatic transmission fluid pump supplies constant fluid pressure to various components such as the main regulator valve, anti-backflow valve, priority valve, TCC control solenoid valve and the TCC regulator control valve.

Line Fluid Circuit

PUMP OUT (3) fluid is directed through the anti-backflow valve into the LINE (2) fluid circuit. LINE (2) fluid supplies constant fluid pressure to various components such as the start/stop check e-pump, default select valve, manual valve, 1-2-3-4-5-6 clutch regulator valve, 1-2-8-9-10-R clutch regulator valve, 2-3-4-5-7-9-10 clutch regulator valve, 4-5-6-7-8-9-10-R clutch regulator valve, 1-3-5-6-7-8-9 clutch regulator valve and the 1-2-3-4-6-7-8-10-R clutch regulator valve. The anti-backflow valve requires a minimum Line VFS pressure of 107 kPa. This pressure nominally corresponds to a minimum line pressure required of 269 kPa.

1-2-3-4-5-6 Reverse Clutch Regulator Valve

Shift solenoid valve A is energized and applying pressure against the 1-2-3-4-5-6 reverse clutch regulator valve allowing LINE (2) fluid to enter the 123456R CLUTCH (21) fluid circuit. 123456R CLUTCH (21) fluid is directed to the 1-2-3-4-5-6 reverse clutch assembly. 123456R CLUTCH (21) fluid is also directed through orifice #6 into the 123456R CLUTCH FEEDBACK (22) fluid passage to the #1 ball check valve which seats against the FEED LIMIT - LOW (15) fluid passage.

1-2-3-4-5-6 Reverse Clutch Assembly

123456R CLUTCH (21) fluid is directed through orifice #9 into the 1-2-3-4-5-6 reverse clutch assembly. 123456R CLUTCH (21) fluid moves the piston against spring force to apply holding of the 1-2-3-4-5-6 reverse clutch plates.

1-2-8-9-10 Reverse Clutch Regulator Valve

Shift solenoid valve B is energized and applying pressure against the 1-2-8-9-10 reverse clutch regulator valve allowing LINE (2) fluid to enter the 1289-10R CLUTCH (24) fluid circuit. 1289-10R CLUTCH (24) fluid is directed to the 1-2-8-9-10 reverse clutch assembly. 1289-10R CLUTCH (24) fluid is also directed through orifice #11 into the 1289-10R CLUTCH FEEDBACK (25) fluid passage to the #2 ball check valve which seats against the FEED LIMIT - LOW (15) fluid passage.

1-2-8-9-10 Reverse Clutch Assembly

1289-10R CLUTCH (24) fluid is directed through orifice #14 into the 1-2-8-9-10 reverse clutch assembly. 1289-10R CLUTCH (24) fluid moves the piston against spring force to apply holding of the 1-2-8-9-10 reverse clutch plates.