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Serving Fountain Valley, California from Yorba Linda · Mon to Fri 8:00 am to 5:00 pm · Sat 9:30 am to 3:00 pm

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Subframe Repair in Fountain Valley, California

Subframe repair rebuilds the structure between the trailer frame and the floor, most often on fifth wheels where the pin box loading has caused rail sag or outrigger separation. Cost runs $2,500 to $15,000.

What this work involves

Fifth wheel subframe failure has a signature: the front cap develops a horizontal crack above the pin box, and the owner assumes it is a fiberglass problem. It is not. The fiberglass cracked because the steel under it bent.

How we approach it

  • We diagnose the steel before quoting the fiberglass
  • Reinforcement is added at the known failure points rather than replacing like for like
  • Floor is re-supported rather than just re-skinned

What sends people here

  • Horizontal crack across the front cap above the pin box
  • Floor that feels soft near the front of the unit
  • Landing gear that no longer sits square
  • Slide room binding only when hitched

Questions

Questions about subframe repair

Why did my fifth wheel front cap crack?

Nine times out of ten the subframe under it deflected. Fiberglass does not spontaneously crack in a straight horizontal line. Repairing the cap without correcting the steel means the crack comes back.

Is subframe failure covered by insurance?

Only if it resulted from a covered event such as a collision. Progressive deflection from overloading is treated as wear and is not covered. We tell you which one you have before you file.

Need subframe repair handled properly?

We serve Fountain Valley, California from the Yorba Linda facility. Send photos and we will tell you what the job actually involves.