T25 spooling problem need help

[-240KId916-]

hi I hav a blacktop sr that a got only a few months ago and it ran fine untill a few days ago.I had noticed when it starts boosting the sound that it makes when it spools sounds very different than usual. and i kno somethings wrong i was thinking mabe its jus the bearings on the inside???it doesnt blow out any smoke and it still boosting 7 psi..mabe you guys can help me out???its the factory t25.thanks

[airman86]

check the turbine shaft for play, that's the first thing i would do. how does it sound different? any way to get a video in-car while doing a pull?