2021 Ford GTFACTORY OEM SERVICE PROCEDURE

Power Steering System Flushing

For information on Ford Color Coded Illustrations refer to OEM Color Coding .

Materials 

Name Specification
Motorcraft® MERCON® LV Automatic Transmission Fluid XT-10-QLVC WSS-M2C938-AMERCON® LV,

Flushing 

NOTE: This flushing procedure requires the use of a

Bleed Box only available from Multimatic. Contact the Ford GT Concierge to obtain a Bleed Box  from Multimatic.

NOTE: Do not attempt to flush the power steering system without using a

Bleed Box provided by Multimatic. Damage to the vehicle and components may result.

  1. Start the engine and manually deploy the rear wing.

    • NOTE: Make sure that this setting is returned to

      Auto once the wing is raised to avoid damage to the system and or components.

      Set the wing to

      Raised  in the instrument cluster.

  2. NOTE: Make sure that the area around and under the vehicle is clear.

    Cycle the vehicle in and out of

    Track Mode  .

  3. Turn the engine off.
  4. Remove the front undershield. Refer to: Front Undershield .
  5. NOTE: Disconnect the VDM electrical connectors as shown. Failure to follow these instructions could lead to component damage or failure.

    Disconnect the VDM electrical connectors.

    GFD344283Courtesy of FORD MOTOR COMPANY
  6. NOTE: Connect connectors to the same colors. Grey-to-grey. Black-to-black.

    Connect the bleed box harness connectors to the VDM.

    GFD344279Courtesy of FORD MOTOR COMPANY
  7. NOTE: Connect connectors to the same colors. Grey-to-grey. Black-to-black.

    Connect the vehicle VDM to the bleed box.

  8. NOTE: Failure to follow these instructions will cause fluid to leak through the breather during the purge cycle.

    Remove the cap and breather from the power steering fluid reservoir. Cover both openings with a lint-free towel.

    GFD344284Courtesy of FORD MOTOR COMPANY
  9. NOTE: Do NOT start the engine.

    Turn ignition ON.

    • Do Not press brake pedal. Press the push button ignition switch.

  10. NOTE: This step is to make sure the system is completely depressurized prior to disconnecting any hydraulic lines.

    Activate the

    SYS PURGE  switch on the

    Bleed Box  until the wing falls into the airbrake mode and fluid stops filling the reservoir.

    • The wing will fall into air brake to show there is no pressure in the circuit.

  11. Deactivate the

    SYS PURGE  switch and turn the ignition OFF.

  12. Lower the front active aero assembly.

    1. Remove the screws.
    2. Loosen the nuts.
    3. Position aside and support the front active aero assembly.

    GFD344285Courtesy of FORD MOTOR COMPANY
  13. NOTE: Be prepared to collect escaping fluid.

    Disconnect the return line from the power steering fluid cooler.

    • Attach an extension hose to the return line, place the open end of the extension hose into a suitable container and allow the contents of the reservoir to drain out completely. Plug the hose once reservoir is empty.

    • Attach an extension hose to the power steering fluid cooler port.

    GFD344286Courtesy of FORD MOTOR COMPANY
  14. NOTE: Do not overfill the reservoir.
Factory Service Tools

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.