[rjmah]

Originally Posted by squirrel

The trailer design has a hole added to both parts, and apparently a pin is inserted to prevent rotation.

http://www.chiefdelphi.com/forums/sh...1&postcount=11

Thanks. I was looking at GE-09036a and GE-09009a. I see the hole for the shear pin now. The fact that GE-09036a is labeled hitch,swivel threw me off. Probably the "a" revision added the shear pin. I guess no trailers will tip without robots tipping as well.