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How do I confim what axles and ratios I have in my Wrangler?

3K views 26 replies 13 participants last post by  Tangle 
#1 ·
I have a 2014 Wrangler Unlimited Sahara, and I'd like to know for sure what axles and ratios I have. How does one determine that?

Many thanks!
 
#3 ·
Thanks!

Could not find a place to request a build sheet, well except to build to buy. I'll give my dealer a call.
 
#5 ·
You can use www.moparownerconnect.com and log in to see your vehicles info online.

Not to hijack the thread but in my case i have an 08 jkur i know from factory it has 4.10 but how can i confirm this by looking at the actual gears?
Count the teeth on the ring gear, count the teeth on the pinion. Divide the number of ring gear teeth by the number of the pinion teeth.
 
#8 ·
Enter your vin in the URL here after the =

http://www.jeep.com/webselfservice/BuildSheetServlet?vin=

This will tell you all options that came on the jeep from the factory including the axle ratio.
That took me to what looks to be a search page with many, many listings, none of which seem to what we're looking for.

However, I did finally stumble across the page in the MoPar link that listed my Jeep's equipment and build.

Thanks guys!
 
#10 ·
Actually that would work, but it would be off by a factor of two due to the action of the differential. I.e. if you have one wheel locked and the other jacked up and free to rotate.
 
#11 ·
easy way to tell for someone with stock tires is check your rpms at 70mph in 6th gear if manual and 5th if auto.
 
#18 · (Edited)
It's very simple, to do, without dis-assembling, or draining your oil!
And I am agreeing with Post number 9!!!

Jack up both rear wheels, and put your trans in neutral. Put a piece of masking tape across the tread on one tire. Next put a piece of masking tape on one spot on your rear drive shaft. Turn your tire and wheel 10 full revolutions, stopping in the same place that you started. As you are turning your wheel through the ten turns, be counting the drive shafts revolutions. It's easy to see, because of the tape.
So Example: At the end of the full 10 wheel revolutions, your driveshaft had 41 revolutions, then you divide 10 into 41, which tells you that you have a 4.10.

That's all that is to it........:thumb:
 
#23 ·
For that to work accurately, you have to be sure that the two rear wheels turn exactly the same amount or you will not get an accurate measurement. Just because one wheel turns 10 times, doesn't guarantee the other wheel turned by the same amount.

You can jack up one rear wheel with the other solidly on the ground, mark the wheel and drive shaft, do the count, divide the wheel turns by the drive shaft turns and then divide that by 2 to cancel the effect of the diff.
 
#24 ·
One other way to determine the ratio. On your axles, I could only find it on the front on mine, there will be a paper sticker with PN xxxxxxxx-1 on it. This is the axle's Build of Material number. Go to Dana's website. When you key it in, it will give you all the info on what is contained in that particular axle. Ratio,bearing numbers, gear numbers, open, limited slip, lockers etc.
Do yourself a favour and write the numbers in your owners manual. They don't last long on paper stickers, and supply handy info when re gearing.
 
#25 ·
Go to Jeep.com, owners, owners site log-in, log on to owners site or register and log in,
you should be on the page for your Jeep, select Learn & Use menu, then select equipment thsi will show the build sheet for your Jeep
 
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