Jack, I have a 2011 378, and I tow a 2011 Ford Escape. I just started towing it and installed an Invisibrake. The tow brackets (I already had a Blue Ox towbar), wiring harness and Invisibrake was $2350.00, installed including tax.
Prior to this, my toad was a 2002 Chevy Tracker, which only weighed about 2800 lbs, and I did not have auxiliary braking. With the Escape, at 3400 lbs,I cannot tell much or any difference in the braking from the Tracker with no brakes.
I will say, the Ford MH chassis brakes are somewhat lacking in my opinion. You have to apply the brakes considerably harder than in my previous Workhorse chassis. Anyway, I would definitely recommend the brakes on your jeep.
Happy Trails, Forrest
(Forrest and Donna)
2011 Georgetown 378TS
2011 Ford Escape V-6 4X4