How to tell what gears I have? - JKowners.com : Jeep Wrangler JK Forum
 
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post #1 of 8 Old 02-25-2014, 05:08 PM Thread Starter
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How to tell what gears I have?

Short of taking apart the diff and looking, whats the most accurate way to know what gears I have in my JKU? Im about to order some 35s and I want to know if I can slide by without gears for a while or if its going to be too much.
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post #2 of 8 Old 02-25-2014, 05:15 PM
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Jack a 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.

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post #3 of 8 Old 02-25-2014, 05:27 PM
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The most accurate way is to submit you VIN to Chrysler electronically and get your build sheet. I got mine in a few hours. I think the link is on here somewhere if you search.

Of course this will be the most accurate if you are talking about stock and they haven't been replaced.

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post #4 of 8 Old 02-25-2014, 05:28 PM
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here ya go :

https://www.jkowners.com/forum/showthread.php?t=48051

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post #5 of 8 Old 02-25-2014, 05:30 PM
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Quote:
Originally Posted by Asmmns View Post
The most accurate way is to submit you VIN to Chrysler electronically and get your build sheet. I got mine in a few hours. I think the link is on here somewhere if you search.

Of course this will be the most accurate if you are talking about stock and they haven't been replaced.
Original owners have had the build sheet be in error on their stock JKs, too.

You just can't beat going out to the Jeep and actually checking it.

2008 Unlimited Rubicon Automatic
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post #6 of 8 Old 02-25-2014, 06:09 PM
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I just searched on google and came to a Chrysler website and typed in my vin and pulled up my sheet on my phone right there. I will try and find the link.

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post #7 of 8 Old 02-25-2014, 07:34 PM
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Here is the url. Add your vin to the end, paste it to your browser and your build sheet will come up....should have the axle ratio listed on there...

http://www.jeep.com/webselfservice/B...etServlet?vin=
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post #8 of 8 Old 02-25-2014, 08:22 PM Thread Starter
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Jeeps site shows that it has 4.10s which is good news but I will definitely check once I get a chance to jack it up. Thanks guys
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