Hey guys I have a mostly stock 07 6.0 with 125k thats always run like a champ and today I was driving to a friends house and as I was accelerating a loud grinding/spinning type of noise came from under the hood so I pulled over and looked and didn't see anything that looked out of the ordinary, I was running the sct x4 canned street tune but i was being pretty light on the pedal because normally I only run the trans only tune. So after that happened I immediately returned the truck to stock, thinking maybe the canned tune just sucked or something, I kept driving and for about 20 min it was fine. My first thought was the turbo so I kept an eye on the stock boost gauge and everything seemed to be fine and then as I was getting on the highway while accelerating moderately it happened again and this time I looked at my boost gauge and it was showing 0. This immediately backed up my theory that the turbo was the problem so I pulled over and removed the boot going to the turbo intake and noticed that the input shaft seemed to have too much play in it and I think the turbine fins looked a little chewed up on the tips, I need to go back out and look again because i had the family with me and it really messed up our day... But this made me think that the noise was the shaft getting out of place and so the fins were maybe rubbing the housing? So i drove it real easy back home with no issues, it was showing boost on the gauge but i made sure to keep it below 10psi so as not to mess anything up anymore. I have a scangauge II and also the sct x4 and neither one read a code and I had no CEL, which seemed weird to me considering i had 0 boost at one time and didn't even get a turbo underboost code?? So does it sound like I need a new turbo, or could I possibly rebuild it and how could I tell if a rebuild would fix the issue vs. a replacement? Any help is really appreciated, thanks guys.