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It may have already been mentioned but instal the 4 oz bottle of GM's differential friction modifier and go to a parking lot and drive in tight circles and figure 8's in each direction for awhile. Sounds like the posi clutches are sticking and when they release the "pop" noise you hear could come from any number of rear suspension parts but the root cause is the posi plates/clutches sticking. I had the same issue with a stock diff ( no heavy spring in posi ) when I changed the diff fluid. I went with Mobil 1 75w-140 lube without the GM friction modifier and the posi clutches groaned and occasionally popped around low speed corners. Added the GM friction modifier to the diff and did the parking lot circles and figure 8's and all is quiet now.
Ed M.
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RJT 2SS/RS, AAM 3.70's, MTI Sway Bars, Shifter, SS brake lines ZLI calipers, rotors/pads BMR Trailing & Toe Arms, rear cradle/diff bushes, Pedders XA's, Camber/Toe eccentrics, Radius arm inserts, GTO clutch reservoir, LS9 cam, Comp valve springs, Melling 10296 oil pump, CR5 timing chain, LS6 damper, CAI Cold Air Intake, ARH LT headers, HF cats, GMPP axle back, Elite Eng Catch Can, Black ZL1 20x10 & 2011 whls 285/35/20 & 305/35/20 General G-Max RS, 2011 Convertible spoiler, 1LE front spoiler, Lloyd "SS" Floor Mats, GM Camaro Trunk Mat, wrapped console, hand brake lever, Grant steering whl.
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