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The groaning from my diff has returned again. Dealer put Vette diff fluid in it and that seemed to quiet it down for a while about 2 years back. Noticing my gas mileage has been dropping a lot lately too. Sounds like I need a new diff. Hopefully my GM extended warranty will cover this.
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2010 Silver SS/RS L99. Pedders Radius Rod & Subframe Inserts, Pedders Sway bars, Pedders Lowering Coils, Pedders Rear Alignment Kit. Solo Mach XL w/J Pipes Catback exhaust
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