Shift Concern: Some/All Shifts Missing (Automatic Mode Only)

WARNING: This page is about a different car, the 2005 Mercury Mountaineer and 2005 Ford Explorer. However, it is still accessible from the selected car via links, so may be relevant.

SHIFT CONCERN: SOME/ALL SHIFTS MISSING (AUTOMATIC MODE ONLY)

Possible Component	Reference/Action
210 - ROUTINE
Powertrain Control System
PCM, vehicle wiring harnesses, shift solenoids A, B, C, torque converter clutch (TCC) solenoid, pressure control solenoids A, B, C, output shaft speed (OSS) sensor, digital TR sensor, intake air temperature (IAT) sensor, vehicle speed sensor (VSS) input	Carry out On-Board Diagnostic Tests. See INTRODUCTION - GASOLINE article for diagnosis and testing of the PCM, IAT and VSS. GO to PINPOINT TEST A , GO to PINPOINT TEST C , GO to PINPOINT TEST D and GO Pinpoint Test E. Repair as necessary. Clear DTCs, road test and rerun On-Board Diagnostic Test.
Some Shifts Missing Only
Some Shifts Missing Only	If only some shifts are missing, determine which shift(s) is missing. Refer to the following routine(s) for further No Shift concerns: No 1-2 Shift, Routine 220 No 2-3 Shift, Routine 221 No 3-4 Shift, Routine 222 No 4-5 Shift, Routine 270 No 5-4 Shift, Routine 271 No 4-3 Shift, Routine 223 No 3-2 Shift, Routine 224 No 2-1 Shift, Routine 225
Fluid
Incorrect level	Adjust fluid to correct level, refer to TRANSMISSION FLUID LEVEL CHECK .
Condition	Carry out Fluid Condition Check. Refer to PRELIMINARY INSPECTION .
Shift Cable/Digital TR Sensor
Cable system or digital TR sensor damaged, misaligned	Inspect and repair as necessary. Refer to AUTOMATIC TRANSAXLE/TRANSMISSION EXTERNAL CONTROLS .
Incorrect Pressures
High/low pressures	Check pressure at line and PC C taps. Carry out Line Pressure Test. Refer to SPECIAL TESTING PROCEDURES .
Main Control
Screws not tightened to specification	Tighten to specification.
Separator plate damaged	Inspect for damage. If damaged, install a new separator plate.
Contamination	Disassemble and clean.
Valve, springs damaged, misassembled, missing, stuck or bore damaged	If damaged or parts are missing, install new main control assembly. If misassembled, reassemble correctly. DO NOT stone, file or sand valves. This will remove the anodized finish and may result in further main control or transmission damage.
Filter damaged or missing	Inspect for damage. Repair as necessary.
Fluid Pump Assembly
Screws not tightened to specification	Tighten screws to specification.
Gasket damaged	Inspect for damage. If damaged, install a new gasket.
Porosity, cross leaks, ball missing, plugged hole	Inspect for damage. If damaged, repair as necessary.
Pump gears cracked and/or seized	Inspect for damage. Install a new pump.
Flow control valves, springs or seals damaged, stuck or not assembled correctly	Inspect for damage. Install a new seal or flow control valve.
Overdrive Planetary Assembly
Planetary damaged	Inspect for damage. Repair as necessary.
Center Support
Screw not tightened to specification	Tighten to specification.
Seal rings or bearing damaged	Inspect for damage. Repair as necessary.
Outside diameter of case bore damaged	Inspect for damage. Repair as necessary.
Support damaged or leaking	Inspect for damage. Repair as necessary.
Direct Clutch Assembly
Seals, piston damaged	Inspect for damage. Repair as necessary.
Check ball damaged, missing, not seating, off location	Inspect for mislocation, poor seating, damage. Install a new cylinder.
Friction elements damaged or worn	Inspect for damage. Repair as necessary.
Return springs damaged	Inspect for damage. Repair as necessary.