The U-Joints in my 2012 Wrangler JKU were binding on the street and popping while in 4WD. After some digging and diagnostics, the axle U-Joints were the source of the noise. This video also explains how to determine if you have the 5-760x or 5-7166x U-joints in your JK Dana 30 axle.

Changing the diff oil after servicing the axles is always a good idea, so any contaminants that were in the axle tubes that got pushed into the diff get flushed out.

00:00 Diagnosing the noise
01:30 Different size U-Joints in different year JKs with D30s
02:52 Dis-assembly overview
03:43 Removing the brakes
05:07 Removing the unit bearing
06:39 Removing the axle
07:57 Comparing the two U-Joints
08:12 Removing the C-clips
09:09 Removing the end caps
11:48 installing the new U-Joints
13:54 Installing the new C-Clips
14:47 Reinstalling the axle
15:14 Alignment spacer stuck in axle tube
15:43 Reinstalling the unit bearing
17:45 Reinstalling the brakes

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