Bob your problem is internal contact points. The chaffer rails are hitting the front of the housing on the forward stroke and the corners of the auger bed on the back stroke. The shoe is hitting the tailings auger cover on the forward stroke and the rear frame assembly on the back stroke. I have the Cleaning System Repair Kit that will fix your problems. Call 701-755-3326 or 701-629-1469, e-mail heartlandrepair@rtc.net, thanks Gordon.