You might have to call a dealer and ask, the GCWR is not listed on my door tag, it only gives the GVWR which is 4600 lbs (Limited trim). Given that, I would assume the GCWR is somewhere around 6000 lbs for the 4x4 9-speed automatic but thats just my rough math, should ask the dealer to be certain.
Edit: After crunching more numbers I'm guessing between 6210 and 6400 lbs, optimistically, but don't be surprised if Jeep plays it safe and says 6000 even. Personally, I've made a couple short (35 mile) trips with an estimated combined weight of nearly 6500 with 5 people in the cabin, a big ole 2000 lb boat, and all our lake gear/coolers/beverages and it was not a problem. I don't think I would dare haul more than that, but just taking the boat and five of us and our gear to the lake didn't seem to stress it out. Highway mileage on flat ground hovered around 20-22 MPG. Obviously I took my time getting up to highway speed and braked as early and gently as possible. The trailer brakes aren't working on that boat trailer and if we were going on any significant trip or doing it every single weekend I would say fixing the trailer brakes would be a must in case of emergency stop but for a handful of short trips I didn't sweat it.
There is no "larger engine", unless you are somewhere outside the USA and even then I think all the other engine options are smaller. In the states there is only the one engine, the 2.4L and the only variation is whether or not you have ESS/StopStart.
To recap, Jeep only recommends towing with the 4x4 models and its the same 2000 pound limit for all of them whether you have the 9 speed auto or the 6 speed manual. If you have the 6 speed auto towing is not recommended (I think the 6-auto only comes with FWD anyways)
Last edited by arudlang; 12-19-2017 at 04:09 PM.