External Leaks

WARNING: This page is about a different car, the 2010 Ford Pickup, 2010 Ford F550 Super Duty, 2010 Ford F450 Super Duty, and 2010 Ford Cab & Chassis. However, it is still accessible from the selected car via links, so may be relevant.

DIAGNOSTIC ROUTINES - EXTERNAL LEAKS

Possible Component	Reference/Action
255 - ROUTINE
Powertrain Control System
Turbine Shaft Speed (TSS)/intermediate shaft speed sensor, Output Shaft Speed (OSS) sensor, transmission vehicle harness connector	Inspect for leakage. If areas around sensor or transmission vehicle harness connector show signs of leakage, install a new sensor O-ring seal.
Transmission Fluid
Incorrect level	Check transmission fluid level and adjust as necessary. Refer to PRELIMINARY INSPECTION .
Condition	Carry out Transmission Fluid Condition Check. Refer to PRELIMINARY INSPECTION .
Transmission External Remote Filter
	Inspect for leakage. If damaged, repair as necessary.
Incorrect Line Pressures
High/low pressures	Check pressure at line tap. Carry out Line Pressure Test. Refer to SPECIAL TESTING PROCEDURES . Follow the pressure diagnosis test as required.
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.
Solenoid(s) damaged, stuck or bore damaged. Manual valve 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.
O-ring damaged	Inspect for damage. If damaged, install a new O-ring.
Porosity	Inspect for damage. If damaged, repair as necessary.
Transmission Case Assembly
Case vent damaged, case porosity	Inspect for damage. If damaged, repair as necessary.
Seals/Gaskets
Leakage at gaskets, seals	Refer to LEAKAGE INSPECTION . Remove all traces of lubricant on exposed surface of the transmission. Repair as necessary.