09-17-2009, 11:39 AM
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CC Member
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Join Date: Dec 2001
Location: Louisville,
KY
Cobra Make, Engine: I'm Cobra-less!
Posts: 9,417
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Grumbling or roaring is usually the sign of a bearing or a universal joint.
If not IRS, then I would start by looking at the outboard axle bearing. You can pull the axle then spin the bearing by hand and see if it feels rough.
A differential bearing would probably make noise at all times and it would be more prominent at higher speeds.
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