I copied this from the Jeep.com site and clicked on the towing option:

Trailer Tow Group: Upgrade to Dana 44 HD Rear Axle. 4.10 Axle Ratio.

Class II Receiver Hitch
Delete Rear Tow Hook
Trailer Tow with 4-Pin Connector Wiring

Therefore looking at the sticker of my Rubi I found that I have the 4.10 Axle ratio so all I need is the tow hitch and harness...

 

I believe so.

 

So it has been a while since I installed my trailer hitch but never towed anything yet, now I'm thinking of buying a utility trailer from HD and it rides parallel with the ground at 15", my Rubi's trailer hitch at the center opening is 19" off the ground....what drop hitch do I need?....since I'm getting from 3.25" to 4" depending who I ask...is there a formula before I go out and get my hitch and start dragging the tail end of the trailer...thanks...

 

I have a stock Unlimited Rubi with the tow package, and I towed the biggest box trailer U-Haul has (6x12) on a 2" drop draw bar, it worked perfectly. 65mph on the highway seemed comfortable.

 

So you're saying that a 2" drop would make a trailer that sits 15" off the ground level, remember you can return your U-Haul, I'm buying my own and don't want to drag the rear end of the trailer...thanks

 

You may need more of a drop depending on what the hookup on the trailer looks like. The uhaul had a good deal of rise on it, which is why it sat level on my 2" drop. I believe this was due to the setup of the surge brakes and whatnot. Sorry if this info isnt that helpful, i must have gotten confused between posts, when someone was talking about renting a U-Haul.

This isnt the exact trailer that i rented, but you can sort of see what i'm saying in this picture.

 

HEK get the 2" drop & move on. The 4" drop couldn't be right that would get you level if teh trailer tongue weighed nothing & you are towning a large sack of air. Your suspension will droop spome when you hook up & that amount will vary based on what you put in or on your trailer. I tow a 6x10 cargo trailer for band stuff & sheet goods from the hardware store. It sits entirely different than my 18 foot hybrid camper. They both are about 17" off the ground. My 6x10 sits slightly uphill with 2" drop. My camper is slightly down hill. Neither one wobbles at anything up to 70 mph. 1" off won't make you drag the rear. it will make the rear 1" closer (if your axles are centered on the trailer).

I guess I'm trying to say that if you want to nail it level every time, get an adjustable height hitch.

 

Well based on this link, the distance of the hitch on my Rubi is 21" and the trailer to the top of the coupler is 16", take away 3" for the hitch ball and the difference is 8"... can someone tell me what they're running on their JK...please I'm going nuts and I want to buy the trailer this weekend as it is NO TAX weekend in MA....