Have a friend who tows a 2012 or 2013 Chevy 3/4T diesel 4X4 auto with an 8' bed so he can put his RAZR up on top. Works fine for him. It's a big DP with lots of HP, a 10,000# hitch and a brake on the truck.
Bill
Nodwell RN110 out moose hunting. 4-53 Detroit, Clark 5 spd, 40" wide tracks, 10:00x20 tires, 16,000# capacity, 22,000# weight. You know the mud is getting deep when it's coming in the doors.