F450 6x6 custom chassis with third axle

CAD Design · Fabrication

F450 6x6 Back Half

A full custom back half conversion on a Ford F450 to add a third axle and turn it into a 6x6. Designed in CAD from the ground up and fabricated in-house — custom frame extensions, suspension geometry, and axle integration built to fit the truck.

SolidWorks CAD model of full F450 6x6 chassis — Full chassis modeled in SolidWorks — frame, suspension, axles, and brakes all designed before cutting any metal.

CAD render of rear suspension assembly — Rear suspension subassembly — custom geometry to integrate the third axle with the existing frame.

Frame jigs set up on welding table — Frame sections jigged up on the welding table before tacking.

Welded frame structure on table — Frame structure tacked and ready for final weld-out.

Side view CAD render of full F450 chassis — Side view of the completed CAD model showing the full chassis with all three axles.