External Leaks

WARNING: This page is about a different car, the 2011 Ford F550 Super Duty and 2011 Ford F450 Super Duty. 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	INSPECT for leakage. If areas around sensor or transmission vehicle harness connector show signs of leakage, INSTALL a new sensor O-ring seal.
Turbine Shaft Speed (TSS)/intermediate shaft speed sensor, Output Shaft Speed (OSS) sensor, transmission vehicle harness connector
Transmission Fluid
Incorrect level	CHECK transmission fluid level and adjust as necessary. REFER to PRELIMINARY INSPECTION in this service information. CARRY OUT the Transmission Fluid Condition Check. REFER to PRELIMINARY INSPECTION in this service information.
Condition
Incorrect Line Pressures	CHECK pressure at line tap. CARRY OUT Line Pressure Test. REFER to SPECIAL TESTING PROCEDURES in this service information. FOLLOW the pressure diagnosis test as required.
High/low pressures
Solenoid Body Assembly
Bolts not tightened to specification	TIGHTEN to specification.
Filter gasket damaged	INSTALL a new filter gasket.
Contamination	DISASSEMBLE and CLEAN. If damaged or parts are missing, INSTALL a new solenoid body assembly. If misassembled, reassemble correctly.
Solenoid(s) damaged, stuck or bore damaged. Manual valve stuck or bore damaged
Fluid Pump Assembly
Bolts not tightened to specification	TIGHTEN to specification.
Gasket damaged	INSTALL a new gasket.
O-ring damaged	INSTALL a new O-ring. REPAIR as necessary.
Porosity	INSTALL a new O-ring. REPAIR as necessary.
Transmission Case Assembly	REPAIR as necessary.
Case vent damaged, case porosity	REPAIR as necessary.
Seals/Gaskets	REFER to LEAKAGE INSPECTION in this service information. REMOVE all traces of lubricant on exposed surface of the transmission. REPAIR as necessary.
Leakage at gaskets, seals