TCC Always Apply/Stalls Vehicle

WARNING: This page is about a different car, the 2005 Ford Pickup, 2005 Ford F550 Super Duty, 2005 Ford F450 Super Duty, and 2005 Ford Cab & Chassis. However, it is still accessible from the selected car via links, so may be relevant.

DIAGNOSTIC ROUTINES - TCC ALWAYS APPLY/STALLS VEHICLE

Possible Component	Reference/Action
251 - ROUTINE
Powertrain Control System
Torque Converter Clutch (TCC) Solenoid	Carry out on-board diagnostic tests. See INTRODUCTION - GASOLINE article or INTRODUCTION -- 6.0L DIESEL article for diagnosis and testing of the PCM.
	GO to PINPOINT TEST A .
	Repair as necessary. Clear DTCs, road test and rerun on-board diagnostic test.
Incorrect Pressures
High TCC pressure	Check pressure at line tap.
	Carry out Line Pressure Test. Refer to SPECIAL TESTING PROCEDURES .
Solenoid Body Assembly
Bolts not tightened to specification	Tighten to specification.
Filter gasket damaged	Inspect for damage. If damaged, install a new filter gasket.
Contamination	Disassemble and clean.
TCC solenoid damaged, misassembled, missing, stuck or bore damaged. Manual valve damaged, misassembled, missing, stuck or bore damaged	If damaged or parts are missing, install a new solenoid body assembly. If misassembled, reassemble correctly.
Fluid Pump Assembly
Bolts not tightened to specification	Tighten to specification.
Gasket damaged	Inspect for damage. If damaged, install a new gasket.
Porosity, cross leaks, cup plug missing, plugged hole	Inspect for damage. If damaged, repair as necessary.
Pump gears and/or gear pocket damaged	Inspect for damage. Install a new pump.
Control valves, converter charge limit valve, converter pressure regulator valve springs, or seals damaged, stuck or not assembled correctly	Inspect for damage. Install a new seal or pump assembly.
Torque Converter
Internal failure preventing TCC from applying	Remove the transmission. Inspect for damage. Refer to TORQUE CONVERTER in the General Procedures portion of this article. If the torque converter fails to pass the criteria for replacement or is damaged, install a new or remanufactured torque converter.