Shift Concern: Timing Concerns-Erratic/Hunting (Some/All)

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: TIMING CONCERNS-ERRATIC/HUNTING (SOME/ALL)

Possible Component	Reference/Action
212 - ROUTINE
Powertrain Control System
PCM, vehicle wiring harnesses, OSS sensor, IAT sensor	Carry out On-Board Diagnostic Tests. See INTRODUCTION - GASOLINE article for diagnosis and testing of the PCM and IAT. GO to PINPOINT TEST E . Repair as necessary. Clear DTCs, road test and rerun On-Board Diagnostic Test.
Fluid
Incorrect level	Adjust to the correct level. Refer to TRANSMISSION FLUID LEVEL CHECK .
Condition	Carry out Fluid Condition Check. Refer to PRELIMINARY INSPECTION .
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.
Overdrive Servo
Servo retaining screws damaged	Inspect for damage. Repair as necessary.
Seals (piston and cover) damaged	Inspect for damage. Repair as necessary.
Further Diagnosis
For further diagnosis for timing issues, refer to	Refer to the following routine(s) for specific diagnosis: 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 Soft/Slip 1-2 Shift, Routine 226 Soft/Slip 2-3 Shift, Routine 227 Soft/Slip 3-4 Shift, Routine 228 Soft/Slip 4-5 Shift, Routine 272 Soft/Slip 5-4 Shift, Routine 273 Soft/Slip 4-3 Shift, Routine 229 Soft/Slip 3-2 Shift, Routine 230 Soft/Slip 2-1 Shift, Routine 231 Harsh 1-2 Shift, Routine 232 Harsh 2-3 Shift, Routine 233 Harsh 3-4 Shift, Routine 234 Harsh 4-5 Shift, Routine 274 Harsh 5-4 Shift, Routine 275 Harsh 4-3 Shift, Routine 235 Harsh 3-2 Shift, Routine 236 Harsh 2-1 Shift, Routine 237