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Unread 11-10-2012, 10:24 AM   #1
crush127
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Gear ratio for 35 inch tires?

What is the correct gear ration to run 35 on tires on a jeep wrangler sport?

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Unread 11-10-2012, 06:11 PM   #2
leftlanetruckin
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ASSuming you have a new JK, with the new motor in it, and not the lethargic minivan motor?
If so, then either 4.56's or 4.88's.
Tranny will also play a part in it too though.
I run 35's and 37's in my 4.0/auto XJ and it handles it good enough. Althoiugh 4.56's would be nice.

Martin
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1998 XJ on 37's.JK Rubi axles with chromo shafts and ctm's, 4:1 transfer case, etc etc etc.
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http://www.jeepforum.com/forum/f12/swap-offically-underway-324622/
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Unread 11-11-2012, 07:39 AM   #3
crush127
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Quote:
Originally Posted by leftlanetruckin
ASSuming you have a new JK, with the new motor in it, and not the lethargic minivan motor?
If so, then either 4.56's or 4.88's.
Tranny will also play a part in it too though.
I run 35's and 37's in my 4.0/auto XJ and it handles it good enough. Althoiugh 4.56's would be nice.

Martin
Thank you. I figured out the mathematical equation. Haaaa!
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Unread 02-03-2013, 07:47 PM   #4
hitechredneck66
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I am going to be ordering a 2013 10th anniversary Rubicon with the auto trans and 4.10 gears. Any thoughts on if it will handle 37s? I live in Utah and will have it in the mountains a lot.
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Unread 02-03-2013, 07:52 PM   #5
leftlanetruckin
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I am running 4.10'a in my JK Rubicon axles that are on the XJ.
With the 37" SSR's and steel wheels, they will put a strain on the 4.0/AW4. I run 35" A/T's for DD duties, on light aluminum wheels, and it is fine. Not sure on the new JK engine, never driven one. On the old one, we test drive a brand new JK Rubi and it was a total turd with stock tires! The XJ's 4.0 on 37's would have beat the snot out of it, then gone for a beer afterwards....

Martin
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1998 XJ on 37's.JK Rubi axles with chromo shafts and ctm's, 4:1 transfer case, etc etc etc.
2003 Range Rover HSE, 4.4 Quad Cam.
1998 Range Rover with a 6.0 LSx
1994 YJ, 4.3/700R4/OME SOA, etc
Western Star 4900EX 4 axle.
4.3/700r4/new frame buildup (YJ)....
http://www.jeepforum.com/forum/showthread.php?t=324622
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Unread 04-13-2015, 05:52 PM   #6
badboysdivin
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gear ratio

i have an 05 rubicon with stock 4 ltr engine, automatic and stock transfer case with 4:10 gears, i recently installed 35 in tires and seem to be a bit underpowered, should i go to 4:88s or are 4:56s, a better option. I don't plan on a lot of hwy driving. thanks for any input
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Unread 04-13-2015, 06:31 PM   #7
jeepn4life92
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Definitely 4.88, maybe even 5.13. Utilize grimmjeeper.com to do some calculations
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Unread 04-14-2015, 08:00 AM   #8
biffgnar
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Quote:
Originally Posted by badboysdivin View Post
i have an 05 rubicon with stock 4 ltr engine, automatic and stock transfer case with 4:10 gears, i recently installed 35 in tires and seem to be a bit underpowered, should i go to 4:88s or are 4:56s, a better option. I don't plan on a lot of hwy driving. thanks for any input
With the 42RLE the ideal gearing IMO for 35s is 5.89.
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Unread 04-15-2015, 09:38 PM   #9
Wheelin98TJ
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Quote:
Originally Posted by badboysdivin
i have an 05 rubicon with stock 4 ltr engine, automatic and stock transfer case with 4:10 gears, i recently installed 35 in tires and seem to be a bit underpowered, should i go to 4:88s or are 4:56s, a better option. I don't plan on a lot of hwy driving. thanks for any input
Neither.

Gear in the 5's.

5.89 would work well but it will require you to swap out the stock Rubi lockers.

I think you can do 5.38 on your stock Rubi lockers.
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Unread 04-25-2015, 03:49 AM   #10
RDPrimeaux
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5.13 or 5.38. I would lean toward 5.38 on 35s. I run 4.88s with 33s in a 2006 Rubicon with an auto. Wish I would have done the 5.13 gears.
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