I always wondered if the tail of the motorhome really (changed the direction of the motorhomes travel(tail wagging the dog).
Looking at the wear on the frame rails from the bolts on the leaf springs, I could see that the rear axle was moving side to side over 1-1/4". If the axle was moving this much from side winds or passing trucks, with this pressure and the leaning of the motorhome, the rear axle had to be twisting and not staying parallel to the front wheels, making the motorhome change direction when pushed by a side wind.
The Driver side of the frame is scraped up pretty good, but the passenger side is worn into the mount of RV Chassis where it is welded to the frame.
The mount is worn about 3/16" deep by about 1-1/2" tall.
Time to build a track Bar or Panhard Bar. The same Bar goes by two different names. Not sure why.
Final Thought - I love it. I should have made this years ago. My motorhome feels so solid now.