Chassis & Structural Repair

Structural and chassis repair is the foundation of any serious restoration or rebuild. If the structure isn't right, nothing else matters — doors won't fit, glass won't seal, and the car will never drive straight. Vehicle owners from Yankton to Vermillion and throughout the region bring their cars to Mohnson Fab because we perform all structural work on a professional chassis table, not on jack stands or a shop floor. This gives us a known-flat, level reference surface and solid mounting points so the vehicle is properly supported and accurately positioned throughout the repair.

We handle unibody repair, body-on-frame structural work, subframe replacement, torque box repair, frame rail straightening and replacement, and any other structural metalwork your vehicle needs. Every repair is measured against factory specifications using our Continental UMS measuring system, so you know the structure is correct — not just close enough.

We perform chassis and structural repair on unibody vehicles, body-on-frame vehicles, classic cars, muscle cars, and anything else that needs structural attention. Our Dakota City, Nebraska shop draws customers from across the region — Sioux City, Omaha, Lincoln, Sioux Falls, Des Moines, and beyond — because professional chassis table work with measured accuracy is not commonly available. Whether your vehicle has collision damage, severe rust in structural areas, or previous repair work that was done incorrectly, we have the equipment and experience to get the structure right.