Originally Posted by RPM
Hmmm. Wonder if 4Runners will be affected eventually. My '05 is exhibiting some surface rust on the frame, diffs, etc. My '95 Jeep did the same thing though.
I think you'll be OK on that one.
From what I've heard, the problem stems from improper cleaning of the frame rails after stamping. Apparently the lubricant used in the forming of the frame rails contained some sort of rendered animal fat, the proteins of which attacked the steel. This made it next to impossible for the rustproofing coatings to properly adhere to the metal.
Not too sure if that's the case or not, but that's what's going around the automotive industry circles.
BTW.....Toyota is trying to blame the whole thing on DANA Corporation.
