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I have solid subframe bushings and swapped the differential bushings and I noticed when I'm going slow (parking lot, particularly) it makes this awful howling noise. I put Royal purple in it, still didn't fix it, so now I'm looking at just upgrading the rear end since I voided the warranty.
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2011 2SS/RS L99
2017 Chevy SS
1979 Z28
Mods: Kooks Long Tube Headers, RotoFaB EForce CAI, American Thunder Catback Exhaust, PFADT Stage 1 Drag Kit + Front Sway Bar, GM Strut Tower Bar. ZL1 Fuel Pump. Nitto NT05R. RX Catch Can.LS9 Cam and Springs.LS3 Conversion.JRE Fuel Rail Upgrade.Edelbrock Eforce.60# Eforce Injectors.Extreme Racing Tune. 523/495
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