I thought I had a tranny going out. I popped the hood and was sniffing my fluids and checking color etc and noticed what looks like a whole bunch of belt dust on my Radix pulley and on the bracket behind as well as the housing. Check out the pics and tell me what you think. I had already wiped down pulley and cleaned out the alternator holes before I thought to get a pic. I'm running a 3.25 pulley and a 111.5 belt so I don't wee why I would have so much slip. I also never heard the belt squeal.

 

Mine dusted with every belt until it broke in (2-3K miles).

 

Mine dusts with the gatorbacks. Didn't with the stocker. Mostly on the pulley. Not that much on the bracket.