Just got my 2012 Rav 4 back from the garage today been here 2-3 weeks. car went in for a terrible whine, rumbling banging sound (loud) on the right rear side, plus we had a engine noise upon start up that lasted a few seconds, we had them check this also. 1st they installed a new timing chain and gears which took care of that start up noise then they took for test drive for the rear noise, found the right wheel bearing was bad so they replaced bearing & hub assby. took for test drive still LOUD rumbling roaring sounds, which turned out to be the rear differential rear bearing, they installed new bearing PARTS WERE COUPLING SUB-ASSY & F.I.P.G. Trans. So the Rav runs very quiet they put 30 miles test driving and so far so good just wanted to post incase others have the same problems.