Soft/Slipping 1-2 Shift

WARNING: This page is about a different car, the 2005 Ford RV Cutaway, 2005 Ford Econoline, 2005 Ford E450 Super Duty, and 2005 Ford Cutaway. However, it is still accessible from the selected car via links, so may be relevant.

DIAGNOSTIC ROUTINES - SOFT/SLIPPING 1-2 SHIFT

Possible Component	Reference/Action
226 - ROUTINE
Powertrain Control System
PCM, vehicle wiring harnesses, transmission internal harness, shift pressure control solenoids, SSPC-B (overdrive clutch control solenoid), TSS/Intermediate shaft speed sensor	Carry out on-board diagnostic tests. See INTRODUCTION - GASOLINE and/or INTRODUCTION -- 6.0L DIESEL articles for diagnosis and testing of the PCM. GO to PINPOINT TEST A and GO to PINPOINT TEST D . Repair as necessary. Clear DTCs, road test and rerun on-board diagnostic test.
Fluid
Incorrect level Condition	Adjust to the correct level. Refer to PRELIMINARY INSPECTION . Carry out Fluid Condition Check. Refer to PRELIMINARY INSPECTION .
Incorrect Pressures
Low pressures	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.
SSP-C solenoid damaged, stuck or bore damaged, manual valve damaged, 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, springs, or seals damaged, stuck or not assembled correctly	Inspect for damage. Install a new seal or pump assembly.
Overdrive Clutch Assembly
Seals, piston damaged	Inspect for damage. Repair as necessary.
Filtered orifice damaged, missing, not seating, off location	Inspect for mislocation, poor seating, damage. Install a new pump.
Friction elements damaged or worn	Inspect for damage. Repair as necessary.
Return springs damaged	Inspect for damage. Repair as necessary.
Snap ring for OWC and/or return spring not seated or damaged	Inspect for damage. Repair as necessary.