2025-03-28

Rear Under Body (Frame Rail Section)

Repair Information

Review all collision repair general practices and safety documentation and wear the appropriate PPE (Personal Protective Equipment) before beginning this procedure.
Properly mount the vehicle on a frame bench when performing this procedure.

Parts List


Quantity	Description	Image / Notes
1	ASSEMBLY - REAR RAIL CASTING (Rear Under Body – Frame Rail Section)
1	PANEL - REAR RAIL SECTION BACKING PLATE (Rear Rail Backing Plate - Section)
15	Structural Flange Rivet

When ordering parts, refer to the Parts Catalog and enter the VIN of the vehicle being repaired to find the correct parts (and the part numbers) for the vehicle. Alternatively, use the search function in the Parts Catalog to find a specific part for the vehicle.

Repair Procedure

Remove the original component.
Cut Line
Note
If the Rear Under Body is damaged forward of the raised cut line, sectioning is not allowed and the entire component must be replaced.

Note
Cut to the rear of the raised cast cut line on the original component, then trim the original component until the service part fits to the correct dimensions (measured using the frame bench). The maximum allowed gap between the new component and the original component is 3 mm.
Prepare for installation.
or Structural Flange Rivets, 6.5 mm
- A = 23 mm
- B = 40 mm
- C = 129 mm
- D = 27 mm
- E = 73 mm
- F = 31 mm
- G = 20 mm
- H = 62 mm
- I = 22 mm
- J = 18 mm
- K = 29 mm
- L = 72 mm
- M = 46 mm
- N = 70 mm
- O = 160 mm
- P = 17 mm
- Q = 66 mm
- R = 19 mm
- S = 10 mm
Apply structural adhesive to the mating surfaces on the vehicle and the new component or components.

Note
Use structural adhesive to fill all gaps between the new component and the original component.
Install the new component or components.
Install the Tailgate Tower.
Install the Rear Fascia Bracket.
Install the Sail Datum Bracket.
Perform any necessary post-repair operations.