So I'm getting frustrated with the 4.10 gears in the 2012 JKUR MANUAL. I have an AEV 3.5" lift, 35" Duratracs (34.5 actual), heavy bumpers, heavy Warn Powerplant winch, and a 100 pound dog (ha).
At first the gears were near perfect! But since adding all the weight it's not ideal now.
I live in Colorado and go into the mountains often and wheel easy/moderate trails. I tow frequently and all the aforementioned mods plus the frequent towing (1500-2000 lbs) has got me wanting the right gears
I'm very very likely not going any bigger then 35's because I drive a lot of miles per year 20-30K (MAYBE I would do 37's years down the road but they are completely impractical for my usage and requirements currently).
For those of you who live at altitude (5000+) AND tow frequently AND have the MANUAL transmission- can you give me feedback on 4.56 & 4.88 gears please?
Also I'd be super interested in doing a test ride in a similarly built rig thats geared 4.56/4.88 and provide refreshments for the opportunity if that's an option!
Thanks and yes I read many gear threads and didn't want to hijack threads to ask this specific question. I also have re-geared before to 4.88 on an LJ but the drivetrain and tires etc are incomparable in this situation
Thank you for the chart. I've seen it and like it, but its hard to tell what it'll feel like at those RPM's acceleration wise and take off wise. I'm really used to the 4.0's of my last two jeeps so its hard to visualize or guesstimate this new Pentastar beast with its higher RPM's and lack of low end torque. Guess I'll have to go drive the guy at the shops 2012 JKUR AUTO with 4.88's and try to pretend there's one more gear?! LOL
I don’t live in the higher elevations and mountains and have nothing to tow like you do so I can see the problems you’re facing with the 4.10s. If it were me I would skip the 4.56s in favor of the 4.88s just to be on the safe side if nothing else. I’d rather error on the low side (higher numerical) than on the high end.
Do you have a link to where that chart came from? I'd like to see a 2011 version. I just went up to 37's and the charts I was looking at said 5.13's or 5.38's, but driving around with 4.10's it really isn't THAT bad - at least not as bad as I was expecting. I can maintain 75 mph on flat interstate at about 1500 rpm or so!