308-07D Transfer Case - Vehicles With: 6-Speed Automatic Transmission - 6F50 2013 - 2014 MKZ
General Procedures Procedure revision date: 09/12/2012

Transfer Case Draining and Filling

WARNING: Before beginning any service procedure in this section, refer to Safety Warnings in section 100-00 General Information. Failure to follow this instruction may result in serious personal injury.

NOTICE: A new Power Transfer Unit (PTU) must be installed any time the Power Transfer Unit (PTU) has been submerged in water.

NOTE: The Power Transfer Unit (PTU) is not to be drained unless contamination is suspected. To drain the Power Transfer Unit (PTU) lubricant, the Power Transfer Unit (PTU) must be removed from the vehicle for Power Transfer Unit (PTU)s without a drain plug. Power Transfer Unit (PTU)s with a drain plug do not have to be removed from the vehicle. Refer to Transfer Case removal. The lubricant that is drained may appear black and have a pungent odor. Do not mistake this for contaminated lubricant.

NOTE: Fill level checks are done in-vehicle only. Let the vehicle sit 10 minutes after the road test before checking the lubricant level.

NOTE: All vehicles

  1. Refer to: Health and Safety Precautions (100-00 General Information, Description and Operation).
  1. Refer to: Jacking and Lifting - Overview (100-02 Jacking and Lifting, Description and Operation).

  1. NOTE: Clean the area around the filler plug before removing.

NOTE: Power Transfer Unit (PTU)s without a drain plug.

  1. With the Power Transfer Unit (PTU) lubricant level even with the bottom of the fill opening, remove as much lubricant as possible from the Power Transfer Unit (PTU) using an Oil Suction Gun
  1. Refill the Power Transfer Unit (PTU) lubricant level even with the bottom of the fill opening and install the filler plug hand-tight.
  1. With the aid of an assistant, rotate the front tires a minimal of 3 times in the same direction.
  1. Remove the filler plug. Using an Oil Suction Gun, remove as much lubricant as possible from the Power Transfer Unit (PTU).
  1. Refill the Power Transfer Unit (PTU) lubricant level even with the bottom of the fill opening and install the filler plug hand-tight.
  1. With the aid of an assistant, rotate the front tires a minimal of 3 times in the same direction.
  1. Remove the filler plug. Using an Oil Suction Gun, remove as much lubricant as possible from the Power Transfer Unit (PTU).

NOTE: Power Transfer Unit (PTU)s with a drain plug

  1. Remove the drain plug and drain the Power Transfer Unit (PTU) lubricant.
  1. Apply silicone sealant to the drain plug threads and install the plug.
    Torque : 12 Nm

NOTE: All vehicles

  1. With the vehicle on a flat, level surface, fill the Power Transfer Unit (PTU) with lubricant. The lubricant must be even with the bottom of the fill opening.
  1. Apply silicone sealant to the filler plug threads and install the plug.
    Torque : 20 Nm


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