I have a 2018 JKU Sport automatic 5 speed with 3.21 gearing. I am upgrading to 3.73 next week! I put about 25-30k highway miles driving a year. We camp a lot and Im looking to purchase a 6x12 Vnose enclosed trailer (1250lbs) to convert into a camper. Only adding 400ish lbs of cargo. Driving flat...