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noise coming from rear end?!?!

This is a discussion on noise coming from rear end?!?! within the Drivetrain forums, part of the LSx Technical Help Section category; sup guys, have a question, I have a high pitch whining noise coming from the rear end. First of all ...

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    red
    2002 Z28

    Angry noise coming from rear end?!?!

    sup guys, have a question, I have a high pitch whining noise coming from the rear end. First of all let me say that, I took it to a rear end place for the rear end bearings, and fixed that problem, but now this high pitch whining noise just came from nowhere, I need help? let me know if it can be anything?

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    James Bond Spikito's Avatar
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    2001 3.8 Black - sold
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    I think they all do that, i know mine does, but only when im cruising, if in accelerating or deccelerating it stops

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    Your dealership guy konigandy6's Avatar
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    Quote Originally Posted by martinez_z28 View Post
    sup guys, have a question, I have a high pitch whining noise coming from the rear end. First of all let me say that, I took it to a rear end place for the rear end bearings, and fixed that problem, but now this high pitch whining noise just came from nowhere, I need help? let me know if it can be anything?
    How long has it been since the repair? If not too long, the rear end needs a break in period. Find an empty parking lot and do tight circle figure 8's. Not fast ones, but that should massage your gears back into place. And then afterwards, change the diff fluid again. Make sure you put the limited slip additive in too.

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    Its been about -2-3 weeks since the repair. going to try to massage the gears back in place, thanks for all your help, will let you know if it works.

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    Your dealership guy konigandy6's Avatar
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    Quote Originally Posted by martinez_z28 View Post
    Its been about -2-3 weeks since the repair. going to try to massage the gears back in place, thanks for all your help, will let you know if it works.
    Make sure you change the fluid again and also make sure the limited slip diff fluid was added, and that you add it when you change the gear lube. Very important!

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    Member Z ROADSTER's Avatar
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    You did of course remind your mechanic to inspect the OEM axles for damage didn't you ? In most cases if the bearings are making noise then your axles are also screwed . The factory axles do not have the heat-treated ends and are very soft so when the bearings go you better change em out right away .

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    found out the problem.. it was the fluid... changed it out and it's running great!!!! time to burn some tires up!!!!!!!!!!!!!!!

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    James Bond Spikito's Avatar
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    my rear end started making some noise a few days ago, it doesnt always do it, but it makes a really loud hum at about 2800-3200 RPM's.

    It actually sounds a lot like an aftermarket exhaust does. you know how it resonates at certain RPM's? but i have a factory exhaust

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