The owners manual says to drive moderately for the first 300 miles, and do not tow a trailer in the first 500 miles, and then, when you do tow, do not exceed 50 mph for the first 500 miles of trailer towing and also don't accelerate hard from a dead stop in that first 500 miles of towing either. You already have over 700 miles on the vehicle, so you should be fine. Just don't drive too fast or accelerate too hard for the first 500 miles of towing.
Sean in PA
2011 Jeep Grand Cherokee Overland
5.7 Liter Hemi V-8
Adaptive Cruise & Blind Spot Monitoring