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Thread: Want to know your gear ratio for sure? Reply to Thread
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  Topic Review (Newest First)
02-20-2015 08:37 PM
1222
Quote:
Originally Posted by SlickJeeper View Post
i need help are 5:13 gears good for a 2010 wrangler on 35's or is that to low of a gear ratio?
5.13s are the most popular gear choice for the JK with 35s and auto. Some people go as low, high numerical, to 5.38s and are very happy with that choice also. This is all for the 3.8 engine (2007-2011) which you have. For those that have the 3.6 (2012-2015) this does not apply.

It would help if you would fill in your profile so we can give better advice. For instance, we have no idea what transmission you have which will reflect just what gears to select.
02-20-2015 07:41 PM
Maertz Na id do 5.38
02-20-2015 07:22 PM
SlickJeeper i need help are 5:13 gears good for a 2010 wrangler on 35's or is that to low of a gear ratio?
06-04-2014 05:20 PM
1222
Quote:
Originally Posted by jwmbishop View Post
Raised one rear tire, rotated 2 times, got dizzy and fell down. Drank another beer, raised another tire (on the front this time), rotated two times (this time remembering to turn the TIRE duh), but the muffler didn't turn so lost track or what I was doing.
Drank another beer.
Drove to mechanic to show me how to do the simple check - forgetting to take jacks out. Thank the lord for steel jack wheels - rubber would not have lasted 6 miles.

Does this mean I have a CAI instead of a gear ratio?
No it means you should stick to iced tea instead.
06-04-2014 01:59 PM
jwmbishop Raised one rear tire, rotated 2 times, got dizzy and fell down. Drank another beer, raised another tire (on the front this time), rotated two times (this time remembering to turn the TIRE duh), but the muffler didn't turn so lost track or what I was doing.
Drank another beer.
Drove to mechanic to show me how to do the simple check - forgetting to take jacks out. Thank the lord for steel jack wheels - rubber would not have lasted 6 miles.

Does this mean I have a CAI instead of a gear ratio?
06-03-2014 08:57 AM
ronjenx
Quote:
Originally Posted by Airborne Lee View Post
Raised Jeep, turned wheel two times, had six beers, I must have 3.10 gears?
See what you get with just one beer.

Did your drive shaft turn a little less than 3 and 1/4 turns?
06-03-2014 08:27 AM
Airborne Lee Raised Jeep, turned wheel two times, had six beers, I must have 3.10 gears?
06-01-2014 05:28 PM
ronjenx Here is the condensed version:

Jack one front tire off the ground.
Put a chalk mark on the tire and the drive shaft.
Rotate the tire by hand 2 complete revolutions while counting the drive shaft turns. The number will be your gear ratio.
A little less than 3 and 1/4 turns will be 3.21 gears.
About 3 and 3/4 turns will be 3.73 gears.
A little over 4 turns will be 4.10 gears.
06-01-2014 05:19 PM
cheroxy
Quote:
Originally Posted by cheroxy View Post
Sorry to resurrect this old thread, but I did what it said on my 2003 TJ and got 7.25 rotations on drive shaft to the 2 rotations of my tire. I have 35" tires on 15" rims. Are these numbers for JK's only?
Nevermind, a little more digging found it, I had both tires rotating instead of just one. It looks like i Have the 3.73 stock ratio.
06-01-2014 05:11 PM
cheroxy Sorry to resurrect this old thread, but I did what it said on my 2003 TJ and got 7.25 rotations on drive shaft to the 2 rotations of my tire. I have 35" tires on 15" rims. Are these numbers for JK's only?
11-29-2012 10:48 PM
riot1987 It out of a mid 70's 1/2 ton chevy
11-29-2012 10:44 PM
ronjenx What vehicle is it in?
11-29-2012 10:40 PM
riot1987 That axle seems almost useless in a wheelin rig.. Aint that a little high?
11-29-2012 07:49 PM
ronjenx
Quote:
Originally Posted by riot1987 View Post
I have a ring gear with 41 teeth and a pinion with 14. Can one of you kind gentlemen give me my ratio? Do you just dived the two numbers? 2.92's..?
You did the math correctly.
11-29-2012 05:49 PM
Taguilar
Quote:
Originally Posted by jstrubberg View Post
Or just get your Jeep up to 70mph, recrd the RPMs then check them against the chart floating around here. Lot less work.
You know where I can find this magical chart?
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