C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

Groan/Pop when turning

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Old Feb 22, 2008 | 10:53 AM
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From: University of Alabama at Birmingham School of Dentistry
Default Groan/Pop when turning

94' with ~70k miles

I know this is probably beating a dead horse, but when I am accelerating through a 90 degree turn (usually right), I will occasionally get a groan and shudder, sometimes accompanied by a slight popping. Would this be wheel bearings or u-joints, or possibly both?

Also, at high speed (120-130 ) I get a severe vibration that doesnt seem to be coming from any particular area of the car. Related?
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Old Feb 22, 2008 | 11:17 AM
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It would more than likely be rear end grease. Drain, flush and refill with a good quality diff lube. Don't forget the two bottles of GM posi additive at the same time. It is possible for it to be the u joints or the wheel bearings, but those are easy for you to check and inspect. If they check out, change your diff lube.

RACE ON!!!
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Old Feb 22, 2008 | 11:47 AM
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BTW, that's rear end hypoid gear oil....it's thick, think its 80 weight, but not technically a grease


You might try jacking the rear off the ground, then grab each rear tire and see if there is any play or looseness in the bearings....if there is any they must be changed and that's your problem plain and simple

You might also want to get under there and check your half shaft U joints too

How many miles on your Vette?

Last edited by 95BLKVette; Feb 22, 2008 at 11:50 AM.
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