Monte,
If my memory serves, the rear bumper on your unit has a 100 lb weight limit. We also have the bolt-on receiver on the back bumper and used it for about a year and half. During that time it was a struggle to secure the bike rack (and bikes) enough to prevent bounce. I used a series of ratchet straps and bungees which got old fast. During one trip I lost the seat of my bike - due to the bouncing, even with the straps and bungees. I finally decided to install a front receiver and that has worked much better. I mount the bikes with the handle bars facing curb side and remove the seats to give unobstructed vision. I did purchase a bike rack that uses tire mounts to support the bikes which allows the bikes to sit lower. I have not read about anyone using the bolt-on receiver losing their bumper. But I have read about cracking of the welds attaching the bumper to the frame.
http://www.trailmanorowners.com/foru...php?albumid=29
Dick