Pentastar, 35s, 4.10s ????
JK Jedi
Joined: May 2011
Posts: 4,343
Likes: 1
From: Wake Forest, NC
Same setup, 4.10s and 35's with AT, lift, tires, bumpers, winch, etc. No problem. Much better than my stock 2011 Rubi...
Can't help on the towing since I haven't pulled anything. My gut instinct is you would want to move up to 4.56 or 4.88 if you are going to tow anything especially if you are in areas with hills.
Colorado boys and girls please chime in!!
Can't help on the towing since I haven't pulled anything. My gut instinct is you would want to move up to 4.56 or 4.88 if you are going to tow anything especially if you are in areas with hills.
Colorado boys and girls please chime in!!
JK Freak
Joined: Jul 2012
Posts: 758
Likes: 0
From: pittsgrove nj
I have 4.56's on my 12 auto and if I had the 4.10's instead of the 3.21's I did have I would not have regeared. The 4.56's and true 35's are about the same as the 4.10's with the stock rubi tires
JK Enthusiast
Joined: Apr 2012
Posts: 310
Likes: 1
From: Houston, TX
I have the 12 auto and 4.10 with 35s setup and have no issues with the towing and some Rockies cruising. It's hard to gauge your hills and towing, but you could try the 4.10 and rehear if needed.
JK Junkie
Joined: Mar 2012
Posts: 2,482
Likes: 1
From: Denver, CO
2012 3.6, 35" auto rubicon with 4:10. Aev procal calibration. No issues with towing, town, highway, mountain road trips, etc. 16 hwy, 14 in town. No complaints. Picks up and maintains better than my land rover. 
JK Newbie
Joined: Nov 2012
Posts: 41
Likes: 0
From: Los Angeles
Just my experience so far....I've had my 2013 JKUR for 5 weeks. TF 3" lift, 35"KM2's, only armor so far is disco skid. I have sliders, tranny/oil pan skid, diff covers c gussets and axle sleeves on the way and to be installed soon. So not a lot of extra weight at this point.
All the reading I did before I bought I was convinced I'd be regearing. I've been impressed with the power of this motor around town. Still good low end and I thought I'd feel a more significant drag from the stock 32's. I live on a small hill of about 1,100 ft elevation and going up the hill, I just use the slapstick to control my shift points a little better-works great.
The true test will be once the armors on and I can get out on the rocks. With the lower tcase gearing I'm not sure how the crawling will be so may still want to regear. But again, been very impressed with how well this motor drives these size tires/lift. I play mostly on the rocks so a good crawl ratio is ideal and I'm hopeful I''ll be equally impressed with the offroad performance and be able to save the $1K for other stuff.
All the reading I did before I bought I was convinced I'd be regearing. I've been impressed with the power of this motor around town. Still good low end and I thought I'd feel a more significant drag from the stock 32's. I live on a small hill of about 1,100 ft elevation and going up the hill, I just use the slapstick to control my shift points a little better-works great.
The true test will be once the armors on and I can get out on the rocks. With the lower tcase gearing I'm not sure how the crawling will be so may still want to regear. But again, been very impressed with how well this motor drives these size tires/lift. I play mostly on the rocks so a good crawl ratio is ideal and I'm hopeful I''ll be equally impressed with the offroad performance and be able to save the $1K for other stuff.