I've towed a lot of trailers with a lot of different tow vehicles. I'd say that towing a <3,000 lb trailer with a Jeep JKU is totally do-able, but its going to depend on the type of driver you are and how your Jeep is set up. I run 35" tires on 4.88 gears and a manual trans and just started towing a Turtleback Getaway (about 2,000 lbs I'd guess). My initial impressions are that towing means shifting a lot more often, especially when I'm stuck behind trucks in the slow lane on a grade . I drove a 96 hp 4wd VW camper bus for years, so I learned how to adjust to driving 60 mph on the flats and 45 mph on hills, and also revving the engine for long periods of time.
One thing about the 3.6 engine is that it has very little torque and hp down below 3,000 rpms. If you have a manual trans, this means planning ahead before hitting hills. To the person that says Jeeps are over-powered, I can only say that he must be a life-long driver of Fiat 124 sedans or VW buses, because I'd say from a power-to-weight ratio, the Jeep is definitely on the low side of all the vehicles I've ever owned. By comparison, I tow a 10,000 lb boat with an F-250 diesel and it is a lot less work than towing a 2,000 lb trailer with the Jeep. But the F-250 won't get to the spots that the Jeep will. There's always a trade-off...
Another thing - you'll take an MPG hit obviously. But its not as bad as you might think. If I travel 65 mph without the trailer on flat ground with no headwind, I can average 18.5 mpg. With the trailer that is looking like around 15.5 to 16.0 mpg. A pleasant surprise, since my old 3.5 ecoboost F-150 would go from 24 mpg down to like 12 mpg when towing my boat!
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