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Old 11-10-2011, 10:31 PM   #1
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4.56 gears w 35's?

How bad will it be. I do dd the hero to work an back top speed 55-60 tops on just local roads. I wheel in woods a lot an occasional rock crawling but I'm not going rousch creek every week or even at all. Worth going 4.88's or will I be ok an if anything little better on road speeds.

Thanks

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Old 11-10-2011, 10:56 PM   #2
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I'm satisfied with my 4.88 gears.
4.0l ax15 with 35's.
Much better than 3.07 w/ 35's!
Sometimes I kinda wished I got 4.56 but overall I am pleased w/ 4.88.

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Old 11-10-2011, 11:10 PM   #3
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Quote:
Originally Posted by JeepTJ78822189
I'm satisfied with my 4.88 gears.
4.0l ax15 with 35's.
Much better than 3.07 w/ 35's!
Sometimes I kinda wished I got 4.56 but overall I am pleased w/ 4.88.
Well yea stock gears with 35 must suck haha. So right you are pleased but what is it you want 4.56 w. just better on road? I mean sadly anymore I don't get out much an honestly these 33's w 4.56 gears I can't go 55 mph without being over 2k rpms which is killin fuel on my small commute. And in woods an tight stuff it's supper jumpy and I need to use like 2-3 gear 4lo. Not complaining but how much different will it be so close in gear going that slow. Thanks for input. I am installing lockers soon an figure while setting angles I can have them install 4.88's. However much more than half jeeps life right now is still road an minor wheeling. So if I'm ok w 4.56 I rather save money.
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Old 11-11-2011, 07:56 PM   #4
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bump. Anyone else know how i'll be with 4.56's an 35's?
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Old 11-11-2011, 08:00 PM   #5
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bump. Anyone else know how i'll be with 4.56's an 35's?
You'd be much happier with 4.88.
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Old 11-11-2011, 08:09 PM   #6
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Quote:
Originally Posted by Jerry Bransford
You'd be much happier with 4.88.
Yea figure so. But where will I not enjoy it
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Old 11-11-2011, 09:15 PM   #7
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I have 35s, 5 speed, and 4.88s. I am glad I went with the 4.88s. Much more acceleration in 5th gear on the highway. Great RPM's with overall city driving. Go with 4.88s.

EDIT: I see you already have 4.56s. You will be fine, your RPMs may be above 3K at about 65 mph.
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Old 11-11-2011, 09:24 PM   #8
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I have 35s, 5 speed, and 4.88s. I am glad I went with the 4.88s. Much more acceleration in 5th gear on the highway. Great RPM's with overall city driving. Go with 4.88s.

EDIT: I see you already have 4.56s. You will be fine, your RPMs may be above 3K at about 65 mph.
Yea thats what I have been trying to say. So running 4.56's how bad will 35's be just going around town. I rarely go over 60mph an if I do its one exit like 2 miles on highway.. I think I did once in past few months now. In woods will I notice to much? 4lo right now is silly slow I can't see 2" tires being that much worse. I rather a tad better mpg on road which that would do right?

So Can I perhaps save a few bucks NOW an do the 4.88's later and run my 4.56's
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Old 11-11-2011, 09:51 PM   #9
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Yea thats what I have been trying to say. So running 4.56's how bad will 35's be just going around town. I rarely go over 60mph an if I do its one exit like 2 miles on highway.. I think I did once in past few months now. In woods will I notice to much? 4lo right now is silly slow I can't see 2" tires being that much worse. I rather a tad better mpg on road which that would do right?

So Can I perhaps save a few bucks NOW an do the 4.88's later and run my 4.56's
I wouldn't go through the trouble of re-gearing. Get the 35s and see how you like it. You will more then likely only notice a difference on the highway. You will probably shift at lower RPM's.

Tire to RPM Ratio Chart | jeepfan.com
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Old 11-11-2011, 09:56 PM   #10
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I wouldn't go through the trouble of re-gearing. Get the 35s and see how you like it. You will more then likely only notice a difference on the highway. You will probably shift at lower RPM's.

Tire to RPM Ratio Chart | jeepfan.com
Yea the chart is what makes me think it won't be to bad for all i do with it and still good on trails. Heres the hook. Will be having a shop install ARB lockers front and rear so I know ring and pinion are set right. And I believe I have someone ith 4.88 gears in box new from Yukon for my exact axles and he said $200 bucks. Which I'll try bartering with to save all I can.


Now is it worth it?
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Old 11-11-2011, 09:58 PM   #11
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Gear Ratio Calculator

I'm running 4.88's with 315/75/16 with the 42rle. I am getting better mileage with that gear set up than those gears combined 285/75/16's. I have a Rubi so I can go deeper if I so choose.
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Old 11-11-2011, 09:58 PM   #12
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Originally Posted by Moroney167 View Post
Yea the chart is what makes me think it won't be to bad for all i do with it and still good on trails. Heres the hook. Will be having a shop install ARB lockers front and rear so I know ring and pinion are set right. And I believe I have someone ith 4.88 gears in box new from Yukon for my exact axles and he said $200 bucks. Which I'll try bartering with to save all I can.


Now is it worth it?
If your gonna go through that, and it was me, then I would re-gear it.
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Old 11-11-2011, 09:59 PM   #13
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Its only a 6% difference from 4.56 to 4.88. That's like a 200rpm difference at 3000rpms, and its not going to make a difference There is no way I would even think about switching if I had 4.56. I'd take the lower highway rpms over a slower crawl speed in a second. Anywhere between 2nd and 5th wont really matter much at all because you could use a lower gear if needed. I have 4.10s and the 6 speed and I'm going to try out 35s for a few months before I even consider changing the gears.
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Old 11-12-2011, 10:35 AM   #14
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Jgorm is right, if 4.56 is already installed it would not be worth it to replace them with 4.88. I did not notice at first that he already had 4.56 which while not optimal for 35" tires, it is certainly adequate.
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Old 11-12-2011, 10:44 AM   #15
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I run 4.56 gears with 36's swampers and very happy with it. Can do 2300rpm at 70mph and get about 16mpg highway. I'm upgrading to 37's here soon.
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Old 11-12-2011, 12:23 PM   #16
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Old 11-12-2011, 12:48 PM   #17
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Well said all. Thanks for input I think it will be nice to have a little lower rpm at 60 than I do now. Can't wait should look awesome w stubby bumper. After install ill check clearances an perhaps 1" BL. Hopefully not

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