That's not a very smart thing to do. The towing capacity for a Jeep
Wrangler JK and JKU is 3500 pounds. Towing any weight over that and you
risk severely bending/stretching your frame. You may not notice it
happening while you're doing it, but it could cause irreparable damage to
your frame. Especially since the new JK frames are now made out of aluminum
alloys instead of steel. Know your car.
+NS G ok, rust is is usually implies oxide of ferrous metal. And in reddish yellow. Oxide of aluminum is usually aluminum oxide. It shall be silver. The fastener used on frame are ferrous metal as well. Using dissimilar metal without barrier for structural component is a big no no because of corrosion. Therefore I am still not very convinced the frame is aluminum. But, it can be zinc coated like body panels do which looks like aluminum at first glance. Plus, the jk unlimited is close to 2 metric tons, It appears to be a number of full ferrous metal built by considering its compact size. In regards the tow hatch damaging the frame, unless someone did had a frame damage by using the OEM hatch. I just feel hard to believe a vehicle was designed to take beating has so little redundancy on structure.
+1djFlashboogie exactly. And +MrBS4, I have a 2015 wrangler. They are indeed beasts. I have gone places and done things most people wouldn't have thought possible while in mine. However, the frame is made of Aluminum alloy. Aluminum alloys can still rust. They are also more pliable than steel. The weights of the newer JKs are lighter by about 300-500 pounds (I know this because I have friends with older JK's and TJ's), this is because they have aluminum alloy frames. Do some research. The tow hitch still connects to the frame and given the right circumstances, towing from the tow hook can still result in frame damage if done incorrectly. Towing that much weight, can be considered towing incorrectly.
JK? Aluminum? No way. My JK frame has rust on the weld. Let along JK weights close to two tons. Aluminum frame just won't weight that much.And form engineering stand point of view, I want the tow hatch has lower strength compared to chassis. So when things go wrong the tow hatch will let go before any damage done on chassis. I will be damn if they don't design the tow hatch this way. I am more worry about the driveline if I am going over rated tow capacity.