I'm curious: Did you hear a grinding noise or notice a lack of boost? What prompted you to inspect it? I've got about 3,000 miles on mine and quadruple checked the spline fit (after hearing of these problems) so I'm relatively confident mine is on there snug. I also get the full 8-10psi at full throttle, so I know I'm not slipping. Any trouble signs you saw would be helpful so I know what to look for.
