Have a 3pt sovema with chain drive. It was leaking around chain drive cover so I took apart and put new gasket on it. Everything inside looks good but when I engage it you can hear a little chain slap. Is this normal or did I get the chain adjuster off alignment when putting cover back on? I do not remember hearing that before but didn't run long because it was leaking so bad. And I didn't monkey with tensioner at all.