Ford Ecosport Owners and Service Manuals

Ford Ecosport: Transmission Cooling - 6-Speed Automatic Transmission – 6F35 / Diagnosis and Testing - Transmission Cooling

Inspection and Verification

  1. Verify the customer concern.
  1. Visually inspect for obvious signs of mechanical or electrical damage.
  1. If an obvious cause for an observed or reported concern is found, correct the cause (if possible) before proceeding to the next step
  1. If the cause is not visually evident, verify the symptom and refer to the Symptom Chart.

Symptom Chart

Symptom Chart – Transmission Cooling
Symptom Possible Sources Action
  • Transmission overheating
  • Bent or crushed transmission fluid cooler tubes
  • INSPECT the transmission fluid cooler tubes for damage. INSTALL new components as necessary.
  • Clogged transmission fluid cooler or transmission fluid cooler tubes
  • INSPECT the transmission fluid cooler and the transmission fluid cooler tubes for plugging. INSTALL new components as necessary.
  • Cooler bypass valve stuck closed
  • INSTALL a new cooler bypass valve.
    REFER to: Cooler Bypass Valve (307-02B Transmission Cooling - 6-Speed Automatic Transmission – 6F35, Removal and Installation).
  • System leaks
  • INSPECT the transmission fluid cooler, the transmission fluid cooler tubes and the cooler bypass valve for leaks. INSTALL new components as necessary.
  • Transmission fluid level overfull

  • REFER to: Transmission Fluid Level Check (307-01B Automatic Transmission - 6-Speed Automatic Transmission – 6F35, General Procedures).
  • Internal transmission concerns

  • REFER to: Diagnosis By Symptom (307-01B Automatic Transmission - 6-Speed Automatic Transmission – 6F35, Diagnosis and Testing).
  • Vibration – a high frequency (20-80 Hz) that is felt through the seat or gear shifter. Changes with engine speed.
  • Transmission fluid cooler tubes grounded
  • CHECK the transmission fluid cooler tubes. REPAIR as necessary.

Check Transmission Fluid Level and Condition

NOTICE: The vehicle should not be driven if the transmission fluid is below the minimum transmission fluid level or internal failure could result.

If the vehicle has been operated for an extended period of time at highway speeds, in city traffic, in hot weather or while pulling a trailer, the transmission fluid may need to cool down to obtain an accurate reading.

The transmission fluid level will differ depending on operating and ambient temperatures. The correct reading should be within the normal operating temperature range.

Transmission Fluid Level Check

To check the transmission fluid level,
REFER to: Transmission Fluid Level Check (307-01B Automatic Transmission - 6-Speed Automatic Transmission – 6F35, General Procedures).

High Transmission Fluid Level

A transmission fluid level that is too high may cause the transmission fluid to become aerated due to the churning action of the rotating internal parts. This will cause erratic control pressure, foaming, overheating, loss of transmission fluid from the vent tube and possible transmission malfunction and/or damage.

Low Transmission Fluid Level

A low transmission fluid level could result in poor transmission engagement, slipping, malfunction and/or damage. This could also indicate a leak in one of the transmission seals or gaskets.

Transmission Fluid Condition Check

  1. Check the transmission fluid level.
    REFER to: Transmission Fluid Level Check (307-01B Automatic Transmission - 6-Speed Automatic Transmission – 6F35, General Procedures).
  1. Place a drop of transmission fluid on a facial tissue and examine the stain.
  1. If evidence of solid material is found, the transmission fluid pan should be removed for further inspection.
  1. If transmission fluid contamination or transmission failure is confirmed by the sediment in the bottom of the transmission fluid pan, repair the transmission and clean the transmission fluid cooler tubes and the transmission fluid cooler.
  1. If the transmission is to be overhauled or if installing a new transmission, the transmission fluid cooler must be backflushed.
    REFER to: Transmission Fluid Cooler - Backflushing and Cleaning (307-02B Transmission Cooling - 6-Speed Automatic Transmission – 6F35, General Procedures).

    Description and Operation - Transmission Cooling - Overview

    This vehicle is equipped with an external transmission fluid cooler. The transmission fluid cooler is an oil-to-air fluid cooler which is mounted in front of the radiator...

    General Procedures - Transmission Fluid Cooler - Backflushing and Cleaning

    Special Tool(s) / General Equipment Transmission Cooling System Heated Flusher Materials Name Specification Motorcraft® MERCON® LV Automatic Transmission FluidXT-10-QLVC WSS-M2C938-AMERCON® LV,   Flushing NOTICE: If the transmission plastic baffle melted due to an overheat condition, install a new cooler...

    Other information:

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    Special Tool(s) / General Equipment

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