Fluid Pressure Directed In Preparation For a Shift

VFS S4 Solenoid D 

The VFS S4 solenoid D is energized at low pressure allowing RANGE FEED fluid to enter S4 VFS SIGNAL fluid circuit. S4 VFS SIGNAL fluid is directed to the mode 2 ETRS valve and S4 VFS accumulator.

Mode 2 ETRS Valve 

S4 VFS SIGNAL fluid is routed to the mode 2 ETRS valve applying pressure against mode 2 ETRS valve spring force. This allows FEED 0 fluid to be directed into the REVERSE fluid circuit. REVERSE fluid is then directed to the #17 ball check valve and the clutch selector valve.

#17 Ball Check Valve 

REVERSE fluid seats the #17 ball check valve against the FEED 1 fluid circuit. The REVERSE fluid seats the #16 ball check valve and is routed thru orifice #60 into the PARK OFF fluid circuit. PARK OFF fluid is directed to the park release servo piston.

Park Release Servo Piston 

PARK OFF fluid is directed to the park release servo piston applying pressure against park release servo piston spring force. The park inhibit solenoid is then energized on.

Clutch Select Control Solenoid I 

The clutch select control solenoid I 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, #12 ball check valve, and the clutch selector valve.

Clutch Selector Valve and #12 Ball Check Valve 

CLUTCH SELECT SOLENOID fluid is routed thru orifice #41 and seats the #12 ball check valve against the 1 REVERSE APPLY fluid circuit which allows CLUTCH SELECT SOLENOID fluid to enter the CLUTCH SELECT VALVE SIGNAL fluid circuit. CLUTCH SELECT VALVE SIGNAL fluid circuit is directed to the clutch selector valve applying pressure against clutch selector valve spring force. REVERSE fluid from the mode 2 ETRS valve is routed to the clutch selector 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 DRIVE 2 fluid circuit. The DRIVE 2 fluid is routed thru orifice #46 and to the #8 ball check valve.

#8 Ball Check Valve 

The DRIVE 2 fluid seats the #8 ball check valve and is forced thru orifice #46. DRIVE 2 fluid is routed to the 5-7 reverse regulator valve.

5-7 Reverse Regulator Valve 

The DRIVE 2 fluid is routed to the 5-7 reverse regulator valve awaiting valve shift.