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Old 08-30-2009, 07:57 PM   #1
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Rear Diff

Can anyone tell me what gears I might have on the rear diff of my '90 YJ? I turn the axle 3.5 times to every one wheel turn. I need to replace rear end but I got one that turns 1.5 times to every tire rotation and has no shock or stabilizer mounts.

Thnx.

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Old 08-30-2009, 08:41 PM   #2
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Originally Posted by mogimus View Post
Can anyone tell me what gears I might have on the rear diff of my '90 YJ? I turn the axle 3.5 times to every one wheel turn. I need to replace rear end but I got one that turns 1.5 times to every tire rotation and has no shock or stabilizer mounts.

Thnx.
sounds like 3.55's to me.

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Old 08-30-2009, 08:44 PM   #3
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if you are changing gears you wanna make sure. 3.5 turns to 1 wheel turn is 3.55 gears. but its always best to count and make sure. divide the number of ring gear teeth by the number of pinion gear teeth.
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Old 08-31-2009, 08:30 PM   #4
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Is there any draw back going from 3.55 to 4.11's. Found some axles to swap out for cheap. I use my YJ mainly as a work horse. Heavy loading up and down steep terrain. Not much freeway usage or rock crawling.
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Old 08-31-2009, 08:57 PM   #5
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as long as both front and rear axles are the same gears 4.11's are fine. Will be a bit quicker for you off the line, and offer more control offroad with teh 4.11's
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