Thread: Okay ... I'm calling GM now.
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Old 08-11-2006, 05:51 AM
Michael1 Michael1 is offline
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Default Re: Okay ... I'm calling GM now.
A few things come to mind here. If it was a brake problem, the noise should change when brakes are applied versus released.

Does the sound change when making turns? If so you can narrow it down to bearings in the axle that provide side force.

Also sometimes you can jack it up with a frame hoist, run the engine with the trans in low gear, and listen with a sound probe to find a bad bearing in the axle.

Does the grinding noise pitch change much with speed? If so, it is probably a bad ring and pinion.

Michael
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