Ok so two months ago I noticed a howling sound only while under heavier acceleration and seems to have a loss of power. I replaced all CAC boots and it is still there. While investigating further I noticed that it only does this in lower gears once I reach the lockup and over drive I can punch it and never hear it . I have tested around the system and couldn't find any leaks for the turbo, I also put bellowed up pipes.... Please help before I throw more money at it. Also I have a short one time clunk noise when going from park to drive but that is the only time it does this.