Rear End Clunk?

[ajpthng]

The only thing I can think of after crawling around under it again is it might be the adjustable track bar. Because the rear axle is rotated for the pinion angle it looks like it's binding in the frame mount and it might move just enough to slap the bracket to cause the clunk. When I get some money saved up I'm going to see about cutting the bracket on the axle and having it relocated to help with the bind.