5-7 Reverse Clutch Releases

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

VFS S3-8 Solenoid

The VFS S3-8 solenoid is energized at low pressure allowing LINE fluid to enter the S38 VFS SIGNAL fluid circuit. S38 VFS SIGNAL fluid is directed to the mode 1 ETRS valve and 3-8 clutch regulator valve.

Mode 1 ETRS Valve

S38 VFS SIGNAL fluid is routed to the mode 1 ETRS valve applying pressure against mode 1 ETRS valve spring force. This allows RANGE FEED fluid to be directed into the FEED 1 fluid circuit. FEED 1 fluid is then directed to the #17 ball check valve and the mode 2 ETRS valve.

#17 Ball Check Valve

FEED 1 fluid seats the #17 ball check valve against the REVERSE fluid circuit. The FEED 1 fluid seats the #16 ball check valve and is routed thru orifice #80 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.

3-8 Clutch Regulator Valve

S38 VFS SIGNAL fluid is routed to the 3-8 clutch regulator valve applying pressure against 3-8 clutch regulator valve spring force. Pressure on the 3-8 clutch regulator valve is low enough to not apply the 3-8 clutch.

Clutch Select Control Solenoid

The clutch select control solenoid is signaled off allowing CLUTCH SELECT SOLENOID fluid to exhaust from the TCC regulator apply valve and the clutch select valve.

Clutch Selector Valve

The clutch selector valve spring pressure shifts the valve to allow CLUTCH SELECT VALVE SIGNAL fluid to seat the #12 ball check valve allowing CLUTCH SELECT VALVE SIGNAL fluid to be exhausted thru orifice #41 into the CLUTCH SELECT SOLENOID fluid circuit which is routed thru orifice #68 and exhausted thru the EXHAUST fluid circuit.

TCC Regulator Apply Valve

The TCC regulator apply valve spring pressure shifts the valve to allow CLUTCH SELECT SOLENOID fluid to be exhausted thru orifice #68 and exhausted thru the EXHAUST fluid circuit

5-7 Reverse Solenoid

The 5-7 reverse solenoid de-energizes releasing pressure against the 5-7 reverse regulator valve spring force. This blocks 57R CLUTCH FEED fluid from entering the 57R CLUTCH REGULATOR fluid circuit. 57R CLUTCH REGULATOR fluid is exhausted thru orifice #25 and #24 into the EX BACKFILL fluid circuit and thru orifice #21 into the EXHAUST fluid circuit.

5-7 Reverse Clutch Assembly

The 5-7 reverse clutch is released allowing 57R CLUTCH fluid to exhaust thru orifice #45 and #44 to the 5-7 clutch boost valve into the 57R CLUTCH REGULATOR fluid circuit. 57R CLUTCH REGULATOR fluid continues thru orifice #22 into the EXHAUST fluid circuit.