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Home >> Lincoln >> 2021 >> Navigator Base, RWD >> Repair and Diagnosis (Single Page) >> Body & Frame >> Frames, Subframes & Crossmembers >> Full Frame And Body Mounting >> Removal And Installation >> Frame Members-Rear Frame Section >> Removal

Frame Members-Rear Frame Section: Removal

  1. Restore the vehicle to manufacturer's dimensions. Refer to: BODY AND FRAME .
  2. Remove the following items:

    1. Refer to: Rear Bumper .
    2. As equipped. Refer to: Muffler and Tailpipe 3.5L EcoBoost .
    3. As equipped. Refer to: Fuel Tank Filler Pipe 3.5L EcoBoost .
    4. Refer to: Shock Absorber and Spring Assembly .
    5. Remove the spare wheel. Refer to: Frame and Body Mounting  .
    6. Unbolt the Front End Sheet Metal (FESM) body mount bolts and raise or remove the body if required. Refer to: Frame and Body Mounting  .

  3. Rear frame section overview.
    GFD546709Courtesy of FORD MOTOR COMPANY
  4. Position the vehicle on a frame rack and anchor per manufacturer's instructions.
  5. NOTE: Do not cut directly along the center of the weld line. Leave enough material on the front side of the weld centerline to allow the remaining weld and frame material to be ground back to the front edge of the front mid rail. This is necessary to make sure of correct fit between the frame and the replacement frame section.
    NOTE: Use caution not cut into the mid rear side rail as it will be reused.

    Using a plasma cutter, reciprocating saw or die-grinder, remove the damaged rear frame section.

    • Separate the ground area of the joints using an air chisel or similar tool and remove the complete rear frame section. Use the General Equipment: Grinder

    GFD546710Courtesy of FORD MOTOR COMPANY
  6. NOTE: Do not thin out the frame rail. The material must maintain a minimum thickness of 3.1 mm (0.12 in) after grinding. This is required to maintain correct energy management in the event of a collision.

    Grind off the excess welding material that remains in rear of the weld line on the frame mid-rail.