its pushing it, but i dont think its dangerous, if you set it up right.
ebc or black magic brake pads and new rotors, adjust and clean rears brakes properly.
air bags or timbrens for the rear weight. a weight distribution hitch.
a gear swap might help in the power department too!(3.73 or 4.10)
always tow with the overdrive locked out.
cherokee tires near stock size.
good brakes on the trailer.
a good brake controler on the jeep.
the aw4 will last fine if you can keep it cool, and not search for gears.
assuming its a 8.25 rear you should be fine. if its a d35 swap it out.