You don't have to buy NEW units.
I tow an 8600# TT with a 2005 Ford F250 4X4 6.0 diesel. That is all I want to tow with my truck. I wouldn't want to tow that much weight with your 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.