Frame: Description and Operation

Frame and Body Mounting

The frame is comprised of:
- steel channel 2-piece rails
- riveted crossmembers (except for the transmission support crossmember)
- bolt-in rear crossmember (trailer hitch)
- bolt-in fifth wheel trailer hitch (optional)

The vehicle body sits on rubber body supports. Lower and upper body supports keep the vehicle body from sitting directly on the frame.

A kit is available to repair the subframe.

For diagonal or X-frame checking, When welding is carried out on the vehicle.

Body Support Mounts
The body support mounts:
- secure the body to the frame.
- cannot reuse body support mounting fasteners. Install new fasteners for each fastener that has been removed or loosened.
- cannot be lubricated during body support mount installation.

Body Support - Front End Sheet Metal (FESM) Mount







Body Support - No. 1







Body Support - No. 2 (Crew Cab Only)







Body Support - No. 3