Turbo boost issue help kw cat t6000

I have a 95 kw t600 3406engine, as i recall if i push accelerate pedal it will rise in idle recently noticed the turbo boost gauge frozen on 10psi with truck off and on idle,also while driving the needle would slow slow motion rise and wont fall down if im off the pedal Not like before the needle would jump fast and go back to zero, any ideas?

 

Well looks some major i was driving to a pickup and pressing pedal to speed up in 2nd and it was reving for a long time til u got up to speed had to cancel load

 

Clutch or turbo? Def not gauge

 

I dont hear it whistleing like before either Not pulling same at all , real long drag when trying to switch a gear and sometimes jst revs til it hit high rpm then pulls, how i check boost leaks? I checked around turbo no signs of leak

 

Very rough idling and popping like when theres a hole in the muffler idk where its coming from looked everywhere

 

Opened the hood touched the turbo and i hear something rattling in it