Digital Transmission Range (TR) Sensor: Installation

2010 Mercury Mariner Hybrid, AWDSECTION Installation
WARNING: This page is about a different variant/trim than selected.

All vehicles 

    NOTE: The TR  sensor is easier to install into the transaxle from under the vehicle.
  1. Install the TR  sensor.
    1. Install the TR  sensor and park pawl actuating rod in the transaxle case.
    2. Install the manual shaft in the transaxle case through the TR  sensor.
      Fig 1: Identifying Park Pawl Actuating Rod And Manual Shaft
      G06376737Courtesy of FORD MOTOR CO.
  2. Using a suitable tool such as center punch or a 5.5 mm (0.216 in) socket and a 101.6 mm (4 in) extension 1/4-inch drive, install a new TR  sensor locking pin.
    Fig 2: Installing TR Sensor Locking Pin
    G06376738Courtesy of FORD MOTOR CO.
  3. Install the TR  sensor detent spring and bolt.
    • Tighten to 13 Nm (115 lb-in).
      Fig 3: Locating TR Sensor Detent Spring And Bolt
      G06376739Courtesy of FORD MOTOR CO.
  4. Connect the TR  sensor electrical connector.
    Fig 4: Locating Transmission Range (TR) Sensor Electrical Connector
    G06376740Courtesy of FORD MOTOR CO.
  5. Install the main control cover grommet.
    Fig 5: Locating Main Control Cover Grommet
    G06376741Courtesy of FORD MOTOR CO.
  6. Clean the main control cover sealing surface.
    Fig 6: Locating Main Control Cover Sealing Surface
    G06376742Courtesy of FORD MOTOR CO.
  7. Apply silicone to the main control sealing surface of the transaxle case.
    Fig 7: Locating Silicone Applying Area On Transaxle Case Main Control Sealing Surface
    G06376743Courtesy of FORD MOTOR CO.
  8. Position the main control cover in place.
    Fig 8: Locating Main Control Cover
    G06376744Courtesy of FORD MOTOR CO.
  9. NOTE: Inspect the main control cover grommet to make sure that the seal is on the inside of the main control cover. Transmission fluid leak will occur.
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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.