Problem overview
Corrosion protection for the frame of the 2000-2003 Toyota Tundra is insufficient for the rear crossmember, under the truck bed. The crossmember is designed for chassis rigidity, truck bed support, and mounting for other components. When the crossmember rusts through there is a loss of rigidity, and can be metal-on-metal vibration from the truck bed.
Toyota has addressed the issue by applying a new coating to the rear of the frame when this issue arises. If deep rusting is present, the crossmember must be replaced.
Proper cleaning of the frame, especially in locations where road salts are used, can help protect the coating.
Toyota Tundra vehicles with this problem
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