Hi all, been trying to diagnose a vibration on a 2012 Chevrolet Malibu 2.4L for almost a year now. Did a tune up, replaced 3 of the 4 engine/transmission mounts, regular oil changes, and took it to a mechanic who said he didn't find a cause. Took a few snippets of the harmonic balancer (crankshaft pulley), can any one confirm if the balancer is bad based upon the screen shots I have from a video? Thanks all.