Gearing question - JKowners.com : Jeep Wrangler JK Forum
 
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post #1 of 5 Old 09-07-2010, 07:53 PM Thread Starter
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Gearing question

I'm not sure if anyone can answer what gearing my JK has by this information but here goes. Running down the interstate at 65 I am at 2000 rpm with worn down 32's which are more like 31's right now. Can anyone tell me if it is the stock 373 or something else?
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post #2 of 5 Old 09-07-2010, 07:57 PM
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Auto or manual?
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post #3 of 5 Old 09-07-2010, 08:02 PM
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2008 x would be 3.21's manual. 3.73's auto/tow/option

no jeep here...
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post #4 of 5 Old 09-07-2010, 08:47 PM
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Quote:
with worn down 32's which are more like 31's right now.
Don't guess, go out and measure them. (your 32's were more like 31's to begin with, so now they are more like 30's... )

Then check your rpm at 70mph, and look at the chart in this thread.
https://www.jkowners.com/forum/showthread.php?t=28326

Or jack up one corner, spin the tire, and count the driveshaft revolutions.

Or check the window sticker (but I'm assuming you no longer have this...)

Or send in your VIN for a new build sheet.

Last edited by GreenJK; 09-07-2010 at 08:50 PM.
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post #5 of 5 Old 09-07-2010, 09:52 PM
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If you choose to jack up one corner, spin the tire, and count the drive shaft revolution, you must spin the tire two revolutions. Only then will the drive shaft count be your gear ratio.
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