4WD Grinding - Diesel Truck Forum - TheDieselGarage.com
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post #1 of 5 (permalink) Old 01-02-2012, 11:09 PM Thread Starter
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4WD Grinding

I have an 08 with 95K. I have noticed recently that when I put it in 4 High there is a grinding from the front end when I am on the gas (sounds like metal on metal breaks). When coasting and it 2WD there is no grinding. I though that it might be an output shaft bearing or gears in the transfer case but they check out. Any ideas?

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post #2 of 5 (permalink) Old 01-03-2012, 03:25 AM
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check the front U-Joints.

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post #3 of 5 (permalink) Old 01-03-2012, 04:38 PM
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What He Said !!

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post #4 of 5 (permalink) Old 01-03-2012, 04:43 PM
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post #5 of 5 (permalink) Old 01-05-2012, 12:45 PM Thread Starter
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The front drive shaft was the culprit.
Here is what it was doing. In 2WD I could here a faint metallic chattering (Sounded like a dust cover on the breaks vibrating) in 4WD it sounded like breaks grinding. When I removed the drive shaft I found that the upper knuckle had a slight bind, when I tore it down I found that there is a non serviceable roller bearing that was completely dry. I picked up a drive shaft from the salvage yard and will rebuild the one that I have for a spare.
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