My experience with 35s, 3.21s, and an auto
#51
JK Newbie
Join Date: Oct 2016
Location: Eastern Washington
Posts: 15
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#52
I have a 2012 JKU Sport Manual trans and 315 Duratracs on 17x9 wheels (measure 33.75 mounted at 29psi). Still working the 3.21 over here for about 9 months now. Been wheeling with it, several black diamond trails, including Badge of Honor trail Gold Mountain. Doable? Yes, even off road. Dropping into 4LO the thing is a beast. Now, that said...will 4.56 be WAY BETTER? Most likely. Re-gearing in March.
The biggest thing that I had to get used to when I went to 315s was how long I had to hold each gear before shifting lol! I'm in 3rd until about 60mph And 6th is pretty much completely non-usable.
The biggest thing that I had to get used to when I went to 315s was how long I had to hold each gear before shifting lol! I'm in 3rd until about 60mph And 6th is pretty much completely non-usable.
#53
i also have the 3.21 with 35's and auto. I did the superchips flashpac update to gearing and tire size with a noticeable difference. Engine is very responsive for DD. Havent been offroad yet but did haul a boat and it felt like it had the power and put it down sufficiently.
#55
JK Enthusiast
Not on 35s but on 33s with 321s and I've had no issues on or off-road. I'm coming from a 2000xj into this thing so it feels awesome. I probably will regear after my powertrain warranty runs out but see no reason to change things now