Towing a pop with auto and 4.88s
Anyone towing a pop with an auto and after market gears of any size? I have read and done the research, I have looked at the charts and calculated RPMs with OD off, blah blah blah 
Anyone actually regear for a camper and what are your thoughts.
I have 305/70/16 and I am going from 3.73 to 4.88s to help with towing, any "real world" experience out there?

Anyone actually regear for a camper and what are your thoughts.
I have 305/70/16 and I am going from 3.73 to 4.88s to help with towing, any "real world" experience out there?
I have a Rubicon with the stock 4.10s in it rolling on 35s. I pull a 2700 lbs. Rockwood Roo with it. It weighs about the same as a larger popup, but has more frontal area than one. It will pull it.... but just barely. The 3.8 is a weakling to start with. Even without a towed load its a slug. But, as long as you are comfortable with terrible gas mileage and preplan your driving strategy a couple miles in advance, you'll be ok. I noticed you have added a tranny cooler. Good, it needs one. Regearing will help get it rolling, but don't count on being able to stay in overdrive (or even top gear in overdrive off mode) while towing. You might want to attempt using your stock gearing to tow with first. If it doesn't have enough HP to stay in overdrive after the regear, its going to downshift and be spinning the motor pretty high. With stock gears, it wont be quite as high. As for the rest of the vehicle for towing.... I use a Reese load leveling hitch with sway-away control and a Prodigy brake controller. I've towed my Roo from Houston to Key West and back and never had any white knuckle episodes. My average MPG was 8.4 mpg.
Originally Posted by owtcast
I have a Rubicon with the stock 4.10s in it rolling on 35s. I pull a 2700 lbs. Rockwood Roo with it. It weighs about the same as a larger popup, but has more frontal area than one. It will pull it.... but just barely. The 3.8 is a weakling to start with. Even without a towed load its a slug. But, as long as you are comfortable with terrible gas mileage and preplan your driving strategy a couple miles in advance, you'll be ok. I noticed you have added a tranny cooler. Good, it needs one. Regearing will help get it rolling, but don't count on being able to stay in overdrive (or even top gear in overdrive off mode) while towing. You might want to attempt using your stock gearing to tow with first. If it doesn't have enough HP to stay in overdrive after the regear, its going to downshift and be spinning the motor pretty high. With stock gears, it wont be quite as high. As for the rest of the vehicle for towing.... I use a Reese load leveling hitch with sway-away control and a Prodigy brake controller. I've towed my Roo from Houston to Key West and back and never had any white knuckle episodes. My average MPG was 8.4 mpg.
I always tow with OD off, as stated in the manual,and it looks like my rpms will be around 3400 with OD off and 4.88. It's high but not screaming.
If I had to do it over again I would have gotten a Rubi, if only for the gearing. Of coarse now, the Pentastar would make even more difference.
I have been trying to do the research on towing as well. We just bought a 2011 jayco x18d. weighs in at 3200lbs dry weight so I am know i am going to be pushing the limits of my 2012 wrangler Rubi. I will run w/ a weight distributing hitch, anti sway, and brake controller. I think it will do ok from what i have read about people's real world experiences. I think that 3500lb tow rating is maybe a little conservative, idk, the euro wrangler are specced out for higher tow numbers, but same suspension, etc. . . This is our first camper. One concern I had, is the frontal area. That is mentioned in the manual as being limited to 32 sq ft. that's the only thing i will be exceeding for sure, as this trailer is I think 8 ft high by at least 8 ft wide. Anybody know how that comes into play?
Thanks,
Ryan
Thanks,
Ryan
Originally Posted by lca355
I have been trying to do the research on towing as well. We just bought a 2011 jayco x18d. weighs in at 3200lbs dry weight so I am know i am going to be pushing the limits of my 2012 wrangler Rubi. I will run w/ a weight distributing hitch, anti sway, and brake controller. I think it will do ok from what i have read about people's real world experiences. I think that 3500lb tow rating is maybe a little conservative, idk, the euro wrangler are specced out for higher tow numbers, but same suspension, etc. . . This is our first camper. One concern I had, is the frontal area. That is mentioned in the manual as being limited to 32 sq ft. that's the only thing i will be exceeding for sure, as this trailer is I think 8 ft high by at least 8 ft wide. Anybody know how that comes into play?
Thanks,
Ryan
Thanks,
Ryan
As for your frontal area, it will be an issue, how much, who knows? For me, and my rig, I sure it wouldn't work.
There is a post around here where a guy talks about towing limits and all that goes into it in great detail, including frontal area.
I laugh when guys around here try to claim the jeep can tow more, often citing the euro 7000lbs limit.
I'm gonna be a guinea pig for sure. but we will be doing majority of our camping at a local place and keeping it in the same spot for most of the summer. Pick it up Friday it's about a 50 mile drive home so we will see how it goes.
Originally Posted by lca355
I'm gonna be a guinea pig for sure. but we will be doing majority of our camping at a local place and keeping it in the same spot for most of the summer. Pick it up Friday it's about a 50 mile drive home so we will see how it goes.
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If I was doing gears nothing lower than4:88 still good for highway speeds and handles my 35s nicely. Anything higher than what you have is going to be better. I would say with your gears and that trailer it's going to be pretty doggie as these 3.8s already are. Not a good tow vehicle.
I have been trying to do the research on towing as well. We just bought a 2011 jayco x18d. weighs in at 3200lbs dry weight so I am know i am going to be pushing the limits of my 2012 wrangler Rubi. I will run w/ a weight distributing hitch, anti sway, and brake controller. I think it will do ok from what i have read about people's real world experiences. I think that 3500lb tow rating is maybe a little conservative, idk, the euro wrangler are specced out for higher tow numbers, but same suspension, etc. . . This is our first camper. One concern I had, is the frontal area. That is mentioned in the manual as being limited to 32 sq ft. that's the only thing i will be exceeding for sure, as this trailer is I think 8 ft high by at least 8 ft wide. Anybody know how that comes into play?
Thanks,
Ryan
Thanks,
Ryan
I pulled mine to Key West from Houston and back last summer. Get ready to pawn your first born for fuel though.


