Hmmmm,, class III receiver hitches are rated at 8,000 lbs for straight line trailer towing.. Our rigs weigh 6,000 lbs and up.. When we're stuck, that line pull weight can easily double depending on how stuck we might be, in which case we break out our pulleys to double the line pull.. I've often toyed with the idea, but after doing the math, and grappling with the physics, my imagination envisions a twisted wreck of steel.. But then again, I'm an old school fuddyduddy, a bit skeptical of all but the tried and true...