Quote:
Originally Posted by JCL
So the pitch of the noise changes directly with engine speed, and not with road speed? That is important to know to help you diagnosis this.
If it does change with engine speed, I would be looking to eliminate the possibility of it being an alternator whine first (ground loop)
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I'm pretty confident it's a gear whine. It's not directly related to engine speed. It is related to road speed. Even if I down shift a gear the sound still happens at 50MPH.
The pitch of the sound does change in relation to the driveline being loaded under accel or decel like a gear whine. I'm guessing its got to be coming from one of the diffs. If it were the trans it would probably change with gear unless it were on the output shaft side of things.