C Clutch

WARNING: This page is about a different car, the 2021 Ford F-150. However, it is still accessible from the selected car via links, so may be relevant.

Symptom Chart

C Clutch

For C clutch operation, REFER to: C Clutch .

C Clutch

Condition	Possible Sources	Action
C clutch does not apply	SSC mechanically stuck OFF	INSTALL a new solenoid. REFER to: Shift Solenoids (SS) .
	C Clutch control valve stuck OFF	DISASSEMBLE, CLEAN and INSPECT the C clutch control valve. If the bore or valve is damaged, INSTALL a new main control valve body. REFER to: Main Control Valve Body .
	C Clutch latch valve stuck OFF	DISASSEMBLE, CLEAN and INSPECT the C clutch latch valve. If the bore or valve is damaged, INSTALL a new main control valve body. REFER to: Main Control Valve Body .
	C clutch hydraulic circuit blocked/leaking	DISASSEMBLE and INSPECT the main control valve body and separator plate passages for debris, blockage and leaks. CLEAN as necessary. REFER to: Main Control Valve Body .
	C clutch hydraulic circuit blocked/leaking	CARRY OUT the air pressure test on the C clutch. REFER to: Special Testing Procedures . If a leak is detected, INSPECT the front support assembly, input shaft Teflon seals, CDF clutch cylinder and C clutch piston seals for leaks. INSTALL new components as necessary. REFER to: Transmission .
	CDF clutch cylinder, ring gear no. 2, sun gear no. 3	DISASSEMBLE and INSPECT the CDF clutch cylinder, ring gear no. 2 and sun gear no. 3 for wear and damage. INSTALL new components as necessary. REFER to: Transmission .
	C clutch piston seals	DISASSEMBLE and INSPECT the C clutch piston seals for wear and damage. INSTALL new components as necessary. REFER to: Transmission .
	C clutch friction plates	DISASSEMBLE and INSPECT the C clutch friction and steel plates for wear and damage. INSTALL new components as necessary. REFER to: Transmission .
C clutch always applied	SSC mechanically stuck ON	INSTALL a new solenoid. REFER to: Shift Solenoids (SS) .
	C clutch control valve stuck ON	DISASSEMBLE, CLEAN and INSPECT the C clutch control valve. If the bore or valve is damaged, INSTALL a new main control valve body. REFER to: Main Control Valve Body .
	C clutch latch valve stuck ON	DISASSEMBLE, CLEAN and INSPECT the C clutch latch valve. If the bore or valve is damaged, INSTALL a new main control valve body. REFER to: Main Control Valve Body .
	C clutch hydraulic circuit cross leaks	DISASSEMBLE and INSPECT the main control valve body and separator plate passages for cracks, warping and damage. If damage is found, INSTALL a new main control valve body. REFER to: Main Control Valve Body .
	CDF clutch cylinder, ring gear no. 2, sun gear no. 3	DISASSEMBLE and INSPECT the CDF clutch cylinder, ring gear no. 2 and sun gear no. 3 for wear and damage. INSTALL new components as necessary. REFER to: Transmission .
	C clutch piston return spring	DISASSEMBLE and INSPECT the C clutch piston return spring for damage. INSTALL new components as necessary. REFER to: Transmission .
	C clutch friction plates	DISASSEMBLE and INSPECT the C clutch friction and steel plates for wear and damage. INSTALL new components as necessary. REFER to: Transmission .
C clutch delayed/soft/slipping apply	Incorrect transmission strategy programmed into PCM/ TCM.	CARRY OUT the Transmission Strategy Download and the Adaptive Learning Drive Cycle. REFER to: Transmission Strategy Download . REFER to: Adaptive Learning Drive Cycle .
	Low line pressure	CARRY OUT the line pressure test. If line pressure is low, REFER to the Line Pressure Diagnosis Chart. REFER to: Special Testing Procedures .
	SSC mechanically sticking	INSTALL a new solenoid. REFER to: Shift Solenoids (SS) .
	C clutch control valve sticking	DISASSEMBLE, CLEAN and INSPECT the C clutch control valve. If the bore or valve is damaged, INSTALL a new main control valve body. REFER to: Main Control Valve Body .
	C clutch latch valve sticking	DISASSEMBLE, CLEAN and INSPECT the C clutch latch valve. If the bore or valve is damaged, INSTALL a new main control valve body. REFER to: Main Control Valve Body .
	C clutch hydraulic circuits blocked/leaking	DISASSEMBLE and INSPECT the main control valve body and separator plate passages for debris, blockage and leaks. CLEAN as necessary. REFER to: Main Control Valve Body .
	C clutch piston seals	DISASSEMBLE and INSPECT the C clutch piston seals for wear and damage. INSTALL new components as necessary. REFER to: Transmission .
	C clutch friction plates	DISASSEMBLE and INSPECT the C clutch friction and steel plates for wear and damage. INSTALL new components as necessary. REFER to: Transmission .
C clutch harsh apply	Incorrect transmission strategy programmed into PCM/ TCM.	CARRY OUT the Transmission Strategy Download and the Adaptive Learning Drive Cycle. REFER to: Transmission Strategy Download . REFER to: Adaptive Learning Drive Cycle .
	High line pressure	CARRY OUT the line pressure test. If line pressure is high, REFER to the Line Pressure Diagnosis Chart. REFER to: Special Testing Procedures .
	SSC mechanically sticking	INSTALL a new solenoid. REFER to: Shift Solenoids (SS) .
	C clutch control valve sticking	DISASSEMBLE, CLEAN and INSPECT the C clutch control valve. If the bore or valve is damaged, INSTALL a new main control valve body. REFER to: Main Control Valve Body .
	C clutch latch valve sticking	DISASSEMBLE, CLEAN and INSPECT the C clutch latch valve. If the bore or valve is damaged, INSTALL a new main control valve body. REFER to: Main Control Valve Body .
	C clutch hydraulic circuit blocked/leaking	DISASSEMBLE and INSPECT the main control valve body and separator plate passages for debris, blockage and leaks. CLEAN as necessary. REFER to: Main Control Valve Body .
	C clutch piston return springs	DISASSEMBLE and INSPECT the C clutch piston return spring for damage. INSTALL new components as necessary. REFER to: Transmission .
	C clutch friction plates	DISASSEMBLE and INSPECT the C clutch friction and steel plates for wear and damage. INSTALL new components as necessary. REFER to: Transmission .