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Old 05-21-2013, 04:56 PM   #1
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Default Rear end noise

The rubbing noise coming from the rearend of my 2005 Sierra has not stopped. It started after getting the brakes serviced. I was told it was the gear oil, it needed additive. It stopped for about a week. Then I changed the gear oil and put in synthetic. No change. I was told I had limited slip. Then I was told I had a locker. But the rubbing is loud enough to vibrate the truck. It happens when I turn at any speed. Not sure what to think or do at this point.
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Old 05-21-2013, 05:12 PM   #2
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only fluid necessary for locker or open is the open type. no limited slip option in the trucks. no additive recommended, in fact there is a gm tsb about the additive causing locking issues in the locker.

i think they are drums on a 05? could be you need drums or pull the drum and inspect the axle area for leakage and thats normally axle bearings and seals.
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Old 05-21-2013, 07:47 PM   #3
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Alldata and gmpartseast.com Both show 75-90 synthetic oil. They don't show any additive for the rear axle. It does show different fluid if you have the rear steer rearend. Also I only looked up the 1500.
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