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Old 06-19-2012, 05:18 PM
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2004 Escalade AWD question

Sorry guys, I know this isn't a hotrodder's question, but my faith in ALL you guys who build cars vastly surpasses the regular "mechanic on the street", so here goes.

I'm SURE one of the front bearing hubs on my AWD has a bad bearing (roaring sound that changes slightly depending on "weight" change - going through a dip on a smooth road). I have not confirmed which one. But I stopped by Advance Auto Parts, and they had the MOOG front bearing hubs, and they showed a kit of TWO. The guy said that a person should replace them both even if only one is bad. And the excuse was "if you replace just one, it puts more pressure on the other, and it will go out right away anyway"..............Well, I DO believe that's a pile of CR*%.

So, what's the story, guys?

Thanks in advance.

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Old 06-19-2012, 06:02 PM
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Moog is a top brand.
The need to replace both at once doesnt add up.Sounds like BS.
I dont see how the traction setup on that vehicle is aggresive enough from side to side to cause an almost certain and predictable failure of the opposite side.
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Old 06-19-2012, 06:04 PM
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I have replaced a lot of these. While it would make since that the bearings were installed at the same time from the factory and both have the exact same mileage on them would be the only indication that you might want to change them both but it is not required.
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Old 06-19-2012, 06:11 PM
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S 10 makes sense too. Maybe GM has a service bulletin for a batch of escalades that had bearing failures, and has generated a TSB for replacement of both sides.
However, I would do one at a time.
Escalades and avalaches have had front differential ring and pinion problems too. Seems there are a few years plagued with that.The ring and pinion would wear and start to make noise. Pricey to fix.
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Old 06-19-2012, 06:23 PM
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However, I would do one at a time.
Agree 100%.
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Old 06-20-2012, 12:03 PM
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Thanks guys, but now I have another question...

I just jacked up both sides of the thing,.. I knew that there'd be a problem with spinning the wheels to find out which side actually is bad..

Do I have to get all four wheels off the ground to confirm which wheel it is? Just thinking, too, that with no pressure on bearings, it may not "show itself".

Any and all tips would be greatly appreciated.
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Old 06-20-2012, 02:22 PM
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I have an AWD Chevy Uplander...have had wheel bearing issues......I jack up all 4 wheels, put it in drive to about 25 mph....slide under and use my stethoscope just near the bearing on the housing....You can usually hear which one it is
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Old 06-20-2012, 08:27 PM
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Thanks, guys, again..

Well, this afternoon I found an incredible young man who works out of his home who has truckloads of experience AND tools..in south Austin.. Will recommend him to do just about ANYTHING !

Anyway, we decided to replace both sides, as they both had a little perceptible grinding sound, once we took them both off...and installed two new Moog assemblies..

Well, kick my arsch, if there is still a bit of a sound..........guess it was/is partly those dang tires...

All is good, though....
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