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Shift Concern: Timing Concerns-Early/Late

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-EARLY/LATE

Possible Component Reference/Action
211- 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.
Some Shifts Early/Late Only   
  • If only some shifts are early/late, determine which shift(s) is missing.
  • Refer to the following routine(s) for further No Shift concerns:
    • Soft/Slipping 1-2 Shift, Routine 226
    • Soft/Slipping 2-3 Shift, Routine 227
    • Soft/Slipping 3-4 Shift, Routine 228
    • Soft/Slipping 4-5 Shift, Routine 272
    • Soft/Slipping 5-4 Shift, Routine 273
    • Soft/Slipping 4-3 Shift, Routine 229
    • Soft/Slipping 3-2 Shift, Routine 230
    • Soft/Slipping 2-1 Shift, Routine 221
Fluid   
  • Incorrect level
  • Condition
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.
Overdrive Band   
  • Band damaged
  • Inspect for damage. Repair as necessary.
  • Servo worn or damaged
  • Inspect for damage. Repair as necessary.
  • Not adjusted correctly
  • Inspect for damage. Repair as necessary.
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