Sometimes when I accelerate from 0-20 and let off the accelerator my 2006 outback 2.5i automatic will make a series of 3 popping and clunking noises coming from the middle and rear end of the car. The noise is loud enough to where I am able to hear it clearly in the cabin and also feel it. I checked the rear axles and they seem fine. My only guess would be either the driveshaft or the diff. its also worth mentioning that the front passenger side has a reman axle on it and there is slight vibration during low speed (0-20) acceleration. the axle is a cardone axle. Any one else have this issue?