lindseyJK

With 3.21 gear and 35 inch tires what could I expect . As in Driveing handeling and millage . It is a daily driver so I cant go to wild with it . So some addivice would be helpful .

silverbullet88

I'm on the app and can't see your year. What year jk do you have? 3.8 will be terrible and 3.6 will be slightly less terrible

silverbullet88

Sorry I'm talking about power wise. Mileage will go down as well.

lindseyJK

I know the millage will go down some and its a 2016 . And like I said I drive it daily about 40 miles a day

silverbullet88

You will feel a power loss. Flat ground may be doable but it'll downshift a lot in the hills and mountains

iron53man

I just got 315 BFG KO2's. the all terrain 35's from bfg on my 2015 jku with 3.21 gearing. There is some power loss and downshifting on hills but it's manageable. It's not bad enough for me to want to spend a couple thousand to regear and all that. I really don't notice it that much, and my actual gas mileage isn't much worse until i go 75 on the interstate. I drive about 40 miles roundtrip everyday on the highway to get to work.

lindseyJK

Thanks iron53man thats what i was hopeing to hear . I still havent decided if I will go with 35"s or 33"s

iron53man

It also depends what lift size your running. The doorless one below is a 3" lift with 33's. the doors on is most recent with a 3" lift and 35's (315 BFG KO2).

Trail Jeeps

At Trail Jeeps we are big on gears, especially with the V6s found in today's JKs. People have different expectations, but having played with a lot of Jeeps I can say that to me a 3.21 geared Jeep on 35s is unacceptable. The downshifting, the loss of power, the loss of fuel economy and the practical loss of 5th gear just does not justify the bigger tires. To me, you're taking an adequately powered Jeep with a good transmission and turning it into kind of a turd.

I would even consider a regear if doing 33s with 3.21s, although you can get by with the 5 speed I would say a 33" tire is kind of the limit. Keep the weight down, find a load range C tire and try to stick with something more narrow. A JK works great with a 35 inch tire as a daily driver, but trust me, take the time and save a little extra money and do the whole thing the right way. The less sexy things like gears are what makes the big difference when putting together a JK, even a mild one that only sticks to the pavement.

kejtar

I got 245 75 16s and I hated it. No power, crappy fuel economy. Inregeared to 4.11s and life was good. If you got the $ to spend to go to 35s - reheat. If you don't- then don't. If you're getting 35s to look cool without regearing - I'll be blunt : other vehicles might be a better choice even 33s with 3.23s will suck.

Btw in early days of jeeping I was where you are. I shopped for an answer I wanted to hear even though I knew the right answer..... and the right answer here is to regear