Lincoln Navigator: Transmission Cooling / Transmission Fluid Heat Exchanger. Removal and Installation

Special Tool(s) / General Equipment

Materials

Removal

1. With the vehicle in N , position it on a hoist.
   Refer to: Jacking and Lifting (100-02 Jacking and Lifting, Description and Operation).
   

1. If equipped, remove the retainers and splash shield.
   

1. Remove and discard the transmission fluid heat exchanger bolt.
   

1. 1. Release the harness retainer tab.
      
   2. Slide the harness retainer off the fluid heat exchanger.
      

1. Remove the transmission fluid heat exchanger nuts.
   

1. Remove the coolant tube hanger nut and separate the hanger from the stud bolt.
   

1. Clamp the coolant inlet and outlet hoses at the front of the engine.
   Use the General Equipment: Hose Clamp(s)

1. NOTE: Be prepared to collect escaping fluid.

   1. Separate the transmission fluid heat exchanger from the transmission case.
      
   2. Lower the transmission fluid heat exchanger to disconnect the hoses and remove it from the vehicle.
      

Installation

1. Inspect the O-ring seals and install new O-ring seals if necessary. Lubricate the O-ring seals before installing the transmission fluid heat exchanger.
   Material: Motorcraft® MERCON® ULV Automatic Transmission Fluid / XT-12-QULV (WSS-M2C949-A, ) (MERCON® ULV)

1. Install the transmission heat exchanger tubes completely into the transmission case and connect the hoses.
   

1. Remove the clamps at the front of the engine.
   

1. Install the coolant tube hanger nut on to the stud bolt.
   Torque: 124 lb.in (14 Nm)

1. loosely install the transmission fluid heat exchanger bolt.
   

1. Loosely install the transmission fluid heat exchanger nuts in sequence shown.
   

1. Tighten the bolt and nuts in the sequence shown.
   Torque: 177 lb.in (20 Nm)

1. Install the harness retainer on the transmission fluid heat exchanger.
   

1. Check and adjust the engine coolant level as necessary.
   Refer to: Engine Cooling System Draining, Vacuum Filling and Bleeding (303-03 Engine Cooling - 3.5L EcoBoost (272kW/370PS), General Procedures).
   

1. Check and adjust the transmission fluid level as necessary.
   Refer to: Transmission Fluid Level Check (307-01 Automatic Transmission - 10-Speed Automatic Transmission – 10R80, General Procedures).
   

1. If equipped, install the splash shield and the retainers.
   Torque: 71 lb.in (8 Nm)