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Other Concern: Transmission Overheating

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.
OTHER CONCERN: TRANSMISSION OVERHEATING

Possible Component Reference/Action
257 - ROUTINE 
Powertrain Control System   
  • PCM, vehicle wiring harnesses, TCC solenoid, pressure control solenoids A, B, C, TFT sensor
Fluid   
  • Incorrect level
Hydraulic/Mechanical   
  • Thermostatic by-pass valve in the main control valve body assembly
  • Verify correct thermal valve function while monitoring TFT. Drive the vehicle for about 32 km (20 miles) or 20 minutes. If the temperature exceeds 102°C (215°F) during the drive, then install a new main control valve body assembly.
Incorrect Pressures   
  • High/low pressures
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.
  • Valves/springs damaged, misassembled, missing, stuck or bore damaged, thermostatic bypass valve 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.
  • Thermostatic by-pass valve damaged or malfunctioning.
  • If the verification procedure confirms the malfunction, install a new main control valve body assembly. If not malfunctioning, inspect for damage. If damaged, install a new main control valve body assembly.
  • 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.
Case   
  • Case vent damaged
  • Inspect for damage. If damaged, repair as necessary.
Torque Converter Assembly   
  • Seized torque converter one-way clutch
  • Remove transmission. Inspect for damage. Refer to TORQUE CONVERTER . If torque converter fails to pass the criteria or is damaged, install a new or remanufactured converter.
  • Excessive slip detected
  
Other   
  • Restriction in the transmission cooling system
  • Excessive trailer tow load
  • Refer to the owner guide for specifications on trailer towing.
  • Engine driveability concerns
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