Symptoms
Soft or holed floors, rot along the rockers, rear corners and under the roll bar, and rusty body mounts. Hagerty says floors usually go around the chassis mounts.
The fix, step by step
- Cut back to clean metal, then fit, clamp and weld in the replacement pan.
- Jeep-CJ.com warns that patches welded over rust just become rust, so remove all of it.
- Replace the body-mount bushings while the floor is open, then seam-seal and paint underneath.
- If the tub is too far gone, Omix and others sell complete steel tubs for 1976–83 CJ-5s.
Tools & part numbers
- Cut-off wheel
- MIG welder
- clamps
- seam sealer
- weld-through primer
Where to buy the parts
Key Parts half floor pan, 1976–83 CJ-5Quadratec ↗Amazon ↗
OMIX 12007.04 front floor pan assembly, 1955–69 CJ-5Quadratec ↗Amazon ↗
Crown J5462447 upper body mount bushing, 1976–86 CJ-5/7/8Quadratec ↗Amazon ↗
Rust Buster rear shackle mount frame section, 1976–86 CJ-5/CJ-7Quadratec ↗Amazon ↗
Hunting a used or discontinued part? Search eBay Motors for Jeep CJ-5 parts →
Rated for a competent home mechanic with a decent tool kit. Confirm torque figures, fluids and procedures against the factory service manual for your VIN, support the truck on stands rather than a jack, and work at your own risk (disclaimer). Some parts links are affiliate links, which pay us a small commission at no cost to you.