Originally Posted by Mr. Dan
Do your 4 Allen head set screws stay tight or do they loosen, too?
That's what was loosening up. It was good for 150 miles then it would clunk on takeoff. They never loosened enough to allow the block to move around or anything, but enough to make noise.
I called Andersen and they told me to check the threads for lube and sure enough someone had put antiseize on there. So I cleaned things up, a little Loctite and it's been several thousand miles since and they still pass a torque check.
I don't know if the dealer lubed them or if they came lubed from Andersen but it wouldn't hurt to check.