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Vibration under power
Ok, so here I go. 2011 Camaro SS. cam, headers, intake manifold, heads, trunion kit, rpm transmission, eaton true track, 391 gears, DSS axles, underdrive pulley, variram cai and tune. The car started vibrating under power in 3rd, 4th, 5th and 6th gear around 3500 rpm. Doesnt do it during coasting or mild driving. Rear, axles and trans are new. Has new plugs also. Checked the axles and Drive shaft play and center driveshaft bearing and all looks good I guess. Ant ideas ?
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