Fluid Pressure Directed In Preparation For a Shift

WARNING: This page is about a different car, the 2020 Buick Regal and 2019 Buick Regal. However, it is still accessible from the selected car via links, so may be relevant.

Manual Valve

With the manual valve in the reverse position, line pressure is directed into the reverse fluid circuit to the clutch select valve.

Clutch Select Control Solenoid

The clutch select control solenoid energizes allowing ACTUATOR FEED LIMIT fluid to enter the CLUTCH SELECT SOLENOID fluid circuit. CLUTCH SELECT SOLENOID fluid is routed to the TCC regulator apply valve and the clutch select valve.

#12 Ball Check Valve and Clutch Select Valve

CLUTCH SELECT SOLENOID fluid is routed thru orifice #41 and seating the #12 ball check valve against the 1 REVERSE APPLY fluid passage allowing fluid to be directed into the CLUTCH SELECT VALVE SIGNAL fluid circuit to the clutch select valve applying pressure against clutch select valve spring force. REVERSE fluid from the manual valve is routed to the clutch select valve which is directed into the REV/57R FEED fluid circuit. REV/57R FEED fluid is directed to the #9 ball check valve.

#9 Ball Check Valve

REV/57R FEED fluid seats the #9 ball check valve against the DRIVE 2 fluid circuit allowing REV/57R FEED to enter the 57R CLUTCH FEED fluid circuit. The 57R CLUTCH FEED fluid is routed thru orifice #46 and to the #8 ball check valve.

#8 Ball Check Valve

The 57R CLUTCH FEED fluid seats the #8 ball check valve and is forced thru orifice #46. 57R CLUTCH FEED fluid is routed to the 5-7 reverse clutch boost valve and to the 5-7 reverse regulator valve.

5-7 Reverse Clutch Boost Valve

The 57R CLUTCH FEED fluid seats the #8 ball check valve and is forced thru orifice #46. 57R CLUTCH FEED fluid is routed to the 5-7 reverse clutch boost valve awaiting valve shift.

5-7 Reverse Regulator Valve

The 57R CLUTCH FEED fluid is routed to the 5-7 reverse regulator valve awaiting valve shift.