I have a 96 3/4t 5.9 automatic.The problem I'm having or I should say concerned about is the turbo when I hit around 15lb boost the pitch of the turbo whine changes dramatically.From a real fine smooth whine to a more coarse kind a whine that goes in and out at the same throttle position.And it doesnt happen all the time. At first it only did it on the freeway full throttle getting up to speed.I put a TST power kit in #8 and now when it decides to screem in come in around 15lb. Also I'm new to diesels and I'm only getting 70-75mph and the pedal is to the floor is this normal for a 5.9?I have a 4.10 axle ratio and the rpm is around 2200-2300 at 70mph.

