2006 Wrangler Rubicon has an intermittent clunking\popping in the front end...... sounds like the front diff. but not positive. It only happens at slow speeds.. I disconnected the front drive shaft but noise still there. I have new wheel bearing assemblies and new sway bar link ends.... The mechanic said everything in the front end checks out, he cannot locate the noise. Can someone please help me with some insight into this problem?