307-01A Automatic Transmission - Vehicles With: 6-Speed Automatic Transmission - 6F50	2013 - 2014 MKZ
Diagnosis and Testing	Procedure revision date: 07/25/2013

Torque Converter Clutch (TCC)

For TCC operation,
REFER to: Transmission Description - System Operation and Component Description (307-01A Automatic Transmission - Vehicles With: 6-Speed Automatic Transmission - 6F50, Description and Operation).

Symptom Chart


Symptom	Possible Sources	Action
TCC does not apply	Solenoid body filter blocked to the TCC solenoid	INSTALL a new solenoid body filter. REFER to: Solenoid Body (307-01A Automatic Transmission - Vehicles With: 6-Speed Automatic Transmission - 6F50, Removal and Installation).
	TCC solenoid mechanically stuck OFF	INSTALL a new solenoid body. REFER to: Solenoid Body (307-01A Automatic Transmission - Vehicles With: 6-Speed Automatic Transmission - 6F50, Removal and Installation).
	TCC regulator apply valve stuck OFF	DISASSEMBLE, CLEAN and INSPECT the TCC regulator apply valve. If bore or valve is damaged, INSTALL a new main control. REFER to: Main Control Valve Body (307-01A Automatic Transmission - Vehicles With: 6-Speed Automatic Transmission - 6F50, Overhaul).
	TCC control valve stuck OFF	DISASSEMBLE and INSPECT the TCC control valve for debris/ blockage. CLEAN as necessary. REFER to: Main Control Valve Body (307-01A Automatic Transmission - Vehicles With: 6-Speed Automatic Transmission - 6F50, Overhaul).
	TCC APPLY hydraulic circuit blocked or leaking	DISASSEMBLE and INSPECT the transmission, main control passages for debris/blockage. REFER to: Main Control Valve Body (307-01A Automatic Transmission - Vehicles With: 6-Speed Automatic Transmission - 6F50, Overhaul). CLEAN as necessary. REFER to: Transmission Description - System Operation and Component Description (307-01A Automatic Transmission - Vehicles With: 6-Speed Automatic Transmission - 6F50, Description and Operation).
	TCC friction material worn or damaged	INSTALL a new torque converter. REFER to: Transmission - Vehicles Built Up To: 03-June-2013 (307-01A Automatic Transmission - Vehicles With: 6-Speed Automatic Transmission - 6F50, Removal and Installation). REFER to: Transmission Support Insulator - Vehicles Built From: 20-May-2013 (307-01A Automatic Transmission - Vehicles With: 6-Speed Automatic Transmission - 6F50, Removal and Installation).
TCC always applied/stalls vehicle	TCC solenoid mechanically stuck ON	INSTALL a new solenoid body. REFER to: Solenoid Body (307-01A Automatic Transmission - Vehicles With: 6-Speed Automatic Transmission - 6F50, Removal and Installation).
	TCC regulator apply valve stuck ON	DISASSEMBLE, CLEAN and INSPECT the TCC regulator apply valve. If bore or valve is damaged, INSTALL a new main control. REFER to: Main Control Valve Body (307-01A Automatic Transmission - Vehicles With: 6-Speed Automatic Transmission - 6F50, Overhaul).
	TCC control valve stuck ON	DISASSEMBLE and INSPECT the TCC control valve for debris/ blockage. CLEAN as necessary. REFER to: Main Control Valve Body (307-01A Automatic Transmission - Vehicles With: 6-Speed Automatic Transmission - 6F50, Overhaul).
	TCC RELEASE hydraulic circuit blocked or leaking	DISASSEMBLE and INSPECT the transmission, main control passages for debris/blockage. REFER to: Main Control Valve Body (307-01A Automatic Transmission - Vehicles With: 6-Speed Automatic Transmission - 6F50, Overhaul). CLEAN as necessary. REFER to: Transmission Description - System Operation and Component Description (307-01A Automatic Transmission - Vehicles With: 6-Speed Automatic Transmission - 6F50, Description and Operation).
	TCC welded or damaged	INSTALL a new torque converter. REFER to: Transmission - Vehicles Built Up To: 03-June-2013 (307-01A Automatic Transmission - Vehicles With: 6-Speed Automatic Transmission - 6F50, Removal and Installation). REFER to: Transmission Support Insulator - Vehicles Built From: 20-May-2013 (307-01A Automatic Transmission - Vehicles With: 6-Speed Automatic Transmission - 6F50, Removal and Installation).
TCC cycles, shudders or chatters	Incorrect Transmission Strategy programmed into the PCM	REFER to: Transmission Strategy Download (307-01A Automatic Transmission - Vehicles With: 6-Speed Automatic Transmission - 6F50, General Procedures).
	TCC solenoid filter or seal damaged	INSTALL a new solenoid body or filter. REFER to: Solenoid Body (307-01A Automatic Transmission - Vehicles With: 6-Speed Automatic Transmission - 6F50, Removal and Installation).
	TCC solenoid mechanically sticking	INSTALL a new solenoid body. REFER to: Solenoid Body (307-01A Automatic Transmission - Vehicles With: 6-Speed Automatic Transmission - 6F50, Removal and Installation).
	TCC regulator apply valve, springs, clips loose, stuck, binding, missing, misassembled	DISASSEMBLE, CLEAN and INSPECT the TCC regulator apply valve. If bore or valve is damaged, INSTALL a new main control. REFER to: Main Control Valve Body (307-01A Automatic Transmission - Vehicles With: 6-Speed Automatic Transmission - 6F50, Overhaul).
	TCC control valve, springs, clips loose, stuck, binding, missing, misassembled	DISASSEMBLE and INSPECT the main control for debris/blockage. CLEAN as necessary. REFER to: Main Control Valve Body (307-01A Automatic Transmission - Vehicles With: 6-Speed Automatic Transmission - 6F50, Overhaul).
	TCC RELEASE/TCC APPLY hydraulic circuit blocked or leaking	DISASSEMBLE and INSPECT the transmission, main control for debris/blockage. REFER to: Main Control Valve Body (307-01A Automatic Transmission - Vehicles With: 6-Speed Automatic Transmission - 6F50, Overhaul). CLEAN as necessary. REFER to: Transmission Description - System Operation and Component Description (307-01A Automatic Transmission - Vehicles With: 6-Speed Automatic Transmission - 6F50, Description and Operation).