Frame

<click on any image to enlarge>

The frame on a Full Size Jeep is an open C-channel design that is fully boxed from the transmission crossmember forward. It gives the frame incredible flexibility and strength. Unfortunately these frames are vulnerable to "FSJ Frame Rot". The gas tank is mounted against the inside of the driverside frame rail. Dirt and road debris frequently collects in the gap between the frame rail and tank, and this is a common spot for the frame to corrode. Short of removing the gas tank it is impossible to detect this until the frame rusts completely through.

Superficially, the Chief's frame looked sound, and everything received a thorough degreasing and pressure washing after the the motor, drivetrain, and gas tank were removed. A little help from Ernie's front end loader made the job easier (don't worry, 55 gallon drums were placed under the Jeep before I started working underneath!).

The frame and undercarriage was pristine - probably due to it's previous history as a South Georgia rig, and a thick coating of "JEEP rustproofing" - a combination of years of leaking ATF, oil, and gear lube.

I spent an entire day cleaning the frame, fenderwells, and floor. The small bit of  superficial rust by one of the gas tank brackets was treated with a thick coat of Corroless, then the entire frame was painted with epoxy Chassis Black paint. The underside of the body and wheel wells were then sprayed with Rubberized Undercoating that dried to a factory finish. All these supplies were order from Eastwood Tools and are top notch restoration quality products that are worth the extra cost.