What does a bad rear end or rear wheel bearing sound like? - JeepForum.com
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Unread 10-23-2007, 07:32 PM   #1
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What does a bad rear end or rear wheel bearing sound like?

I am still fighting a vibration and it is getting worst. I have balanced my rear drive shaft put in new u-joints new tires a new stearing stablizer and now new shocks. I think the rear end bearing or a rear axle bearing is going bad. does anyone know what it would sound or feel like if the pinion or rear wheel bearning were to go out?

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Unread 10-24-2007, 09:10 AM   #2
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A bad pinion bearing make a roaring or growling noise inthe rear area of the Jeep. It may change pitch a litttle bit under steady throttle making it sound sort of like wow WOW wow WOW wow. Really bad pinion bearings will wobble about when you push/pull them by hand.

Bad rear drive shaft ujoints make a similar noise, but are easy and inexpensive to replace. Axle ujoints tend to makes noise on acceleration and not coast or coast and not acceleration. Start with new ujoints. If the noise is still there you look at the axle bearings and you probably needed new drive shaft ujoints anyways.

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Unread 10-24-2007, 09:15 AM   #3
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A bad wheel bearing typically sounds like your running 36" Swampers.

Check the pinion by jacking up the rear, and reefing up and down as hard as you can. Basically you're looking for any play. There should be a little play back and forth, AKA backlash, but it shouldn't move up and down.
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Unread 10-24-2007, 10:01 AM   #4
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After checking all above posts, check to see if your U-Bolts are tight. If they are loose and you have slop in the axle, your pinion angle could be changing causing you U-joints to throw off vibes......

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