Gear ratio for 35s - JKowners.com : Jeep Wrangler JK Forum
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post #1 of 19 Old 03-04-2012, 01:16 PM Thread Starter
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Gear ratio for 35s

Im lookin at purchasing 35" mt/r tires.. i will be purchasing a 2.5 lift along with the tires.. my question is will the stock 6 spd gears be able to handle the tire size? I read in another thread discount said that the tires should be available mid to late march.

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post #2 of 19 Old 03-04-2012, 01:42 PM
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Your profile says you have a Sport, but doesn't indicate what gears you have. Sports come standard with 3.21s, but have an option for 3.73s. The 3.73s on a 6-spd should be fine. You'll probably lose 6th gear around town, but it'll still be useful on the highway. With 3.21s you'll be struggling a little and lose 6th gear completely. You'll probably be wanting to re-gear sooner.

On the trails, if you crawl, you'll want to re-gear with either.

Get the 35s and you can always re-gear later.

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post #3 of 19 Old 03-04-2012, 01:42 PM
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Good luck finding 35" Kevlars... assuming that's the MT/R you're talking about.


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post #4 of 19 Old 03-05-2012, 07:29 AM
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If you decide to regear, go with 5:13's so you dont have to regear again when you go to 37's.
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post #5 of 19 Old 03-05-2012, 07:46 AM
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5.13 is perfect!!!

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post #6 of 19 Old 03-05-2012, 07:56 AM
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Quote:
Originally Posted by STUPIDFACE View Post
If you decide to regear, go with 5:13's so you dont have to regear again when you go to 37's.
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5.13 is perfect!!!
^^This
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post #7 of 19 Old 03-05-2012, 08:01 AM
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4.56 would make a nice highway/road gear, 4.88 would be ideal in my opinion, help the crawl some off-road...but if there is ANY chance you want to go 37s or bigger, definitely consider 5.13s

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post #8 of 19 Old 03-05-2012, 04:55 PM
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35s with 2.5 inch RK running 3.73 starting tomorrow (stock) 5.13s on the way
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post #9 of 19 Old 03-11-2012, 09:17 PM
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I remember looking to regear my TJ that I had to get new carriers also?! Are these needed on the JKs also? I'd assume a D30 is a D30 right (looking for a stronger axle actually)... and of course the 44 in the rear? I can't even find carriers to swap gears.
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post #10 of 19 Old 03-15-2012, 09:40 AM
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What year is your Jeep? The 3.8 V6 will require 4.10's as the tallest gearset that'll be happy with the 6-speed. If you have a 2012 with the 3.6 V6, then I can't speak with any personal experience.


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post #11 of 19 Old 03-20-2012, 07:09 PM
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513, 6 speed on 35's. no regrets. runs at about 2800ish rpm doing 65.

also, i would recomment gussets and sleeves. i have them. HUGE improvement over stock
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post #12 of 19 Old 03-21-2012, 03:51 AM
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Quote:
Originally Posted by qkslvr View Post
35s with 2.5 inch RK running 3.73 starting tomorrow (stock) 5.13s on the way
Hey- how is this setup running for you? Is it unbearable on the highway at speeds of 60 or 70.
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post #13 of 19 Old 04-04-2012, 12:49 PM
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Quote:
Originally Posted by qkslvr View Post
35s with 2.5 inch RK running 3.73 starting tomorrow (stock) 5.13s on the way

Quote:
Originally Posted by chrisd0729 View Post
Hey- how is this setup running for you? Is it unbearable on the highway at speeds of 60 or 70.
Bump on this, I would love to kow also! This is the same exact set up I'm looking at (minus the 5.13s for now)

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And everything else is stock. For now.

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post #14 of 19 Old 04-04-2012, 12:57 PM
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I am running 35" MTR/Ks with 4.10 gears (Rubi 6 speed) and a 3.5" lift for a year and had 35" Cooper MTs on it prior to that with 4.10s. It's doable but would be better regeared. If you have an automatic like my previous JK with 35s and 4.10s (Rubi), it's a DOG on hills unless you disengage the electronic O/D!!! At least with a stick you can downshift to 5th and keep on cruising.

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post #15 of 19 Old 08-23-2012, 09:29 AM
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I've got 35s running a 3.5" lift with 3.73s right now. Most of my time is spent on the road since it is my DD, but I'm a weekend wheeler. I want to go up and was looking at 4.56, but I seem to be reading that 4.88s are ideal? I wanted to know how this affects highway driving? Anybody else have this issue? Also, I only have the 4-speed auto, so I think that changes things.

Also, would it be easier to re-gear, or just swap out for a new axle(s) with the specified gear ratio?
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post #16 of 19 Old 09-08-2012, 12:50 PM
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Attachment 55707 someone se t this to me hope it helps

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Last edited by xxxxxxxEast Coast Surf; 10-14-2012 at 07:58 AM.
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post #17 of 19 Old 11-23-2012, 12:59 PM
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Running 35" BFG MT's on OEM wheels with 1.5" spacers on an '08 4 door Rubi with full soft top/half doors an the auto trans.

It wasn't an interstate hill champ with the stock tires, but with a downshift out of OD, it was fine. This V-6 loves to rev, so it has no problems doing so wth the 35's.

The 35's are only on the JK when we go wheeling.Otherwise it wears a set of the 17" Goodyear all-seasons. So changing gears is not an option for us.

Overall, yeah, they slow it down a little, but not a significant amount. I think 4.88's would be too much gear for 35's.

Sorry if this post wanders. I had a few customers come in while trying to post it.

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post #18 of 19 Old 05-08-2014, 09:20 AM
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I just put in 4.56

2014 amp'd sport
2 in OME lift
1.25 body lift
4.56 Yukon gears
35 in KM2
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post #19 of 19 Old 02-27-2018, 09:19 AM
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I recently changed to 4.88's from stock 3.21's on my 3.6 manual with 35's. I was debating between 4.56 & 4.88 and decided to go to 4.88 because I tow a lot. The tires measure actual 34". I am happy I went 4.88. 2700 rpm at 70 is fine. It seemed a little high at first, but I am used to it now. I can drive 80 no problem, which I don't do very often. The power really makes a difference though. I never have to downshift going up hills on the highway anymore and I can pretty much roll around town at any speed in 4th.
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