Alright so I'm new to this site but there's been something I've been wanting to figure out on my 2006 dodge ram 1500 4.7 V8 truck. Ok so I bought the truck last year and it's been pretty reliable so far it runs good with only 104 thousand miles and it shifts perfectly fine but a problem I can't seem to find the answer for anywhere is a turbo like sound when it's in park and revving at higher rpms or at 5th gear and sometimes at 4th gear. It sounds like it's coming from under the truck but the best way to put it is it sounds like a turbo but it still shifts and drives perfectly fine but my truck doesn't have a turbo. I have no idea what it is and if anyone else has this problem and a fix for it I would greatly appreciate it.