Originally Posted by cm11599ps
Well, the frame on my trailer says it should not be towed by a one ton truck or more....snip
Yep, I've seen the same sticker on some lite weight trailers as well. I "think" what Jayco is saying is that they know that the particular lite A-frame and lite trailer frame in question has known limitations, and reducing the transfer of road vibrations (via a stiff suspension TV like a 1-ton) to the trailer A-frame reduces failure risk.
Similar to those maximum size WDH stickers located on the side of some A-frames.
I recall a few years back a couple of RV manufactures having some A-frame "bending" issues with some Lite trailers, and I believe Jayco was one of them.