rearend issue, help.

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Jul 6, 2013 | 10:29 PM

ghoastrider1

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Le Mans Master

Joined: May 2006

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From: indy indiana

rearend issue, help.

saw an answer to this months ago, but cant find it. I nailed the vette the other day and heard a thump come from the rearend. Seems like the posi isn't really working now, but not sure. Just doesn't seem right. Where to look first? Thanks.

Jul 6, 2013 | 10:34 PM

leesvet

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Joined: Apr 2011

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pull some fluid and take a close look for metal. Otherwise, drain and refill with GM posi-additive and the proper wt grease.

A clunk/clank can be a joint also..

Jul 7, 2013 | 07:07 AM

ghoastrider1

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Le Mans Master

Joined: May 2006

Posts: 7,708

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From: indy indiana

thanks. Its not the sound a u-joint makes. Sounds more like something larger broke.

Jul 7, 2013 | 10:34 AM

leesvet

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Joined: Apr 2011

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ouch...

then I'd pull some lube out and strain it thru a white cloth and look for metal...

Jul 7, 2013 | 01:30 PM

radar502

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Joined: Dec 2009

Posts: 4,363

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From: Birmingham Al

This is not a Add. for the Purple stuff ..This is what I did helped ..Drained oil ,put in Royal Purple gear oil,then went right around then left around a few times .Mine stoped makeing a sound.. Very messy job and not cheap ..Just saying worked for me...

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