Okay, just bought the truck about a month ago. About 1800 miles ago started getting an eek sound only when the ishift transmission would shift. Now its pretty much constant when driving, and engine braking. If I let off accelerator and coast the obnoxious noise stops. Found where it's leaking, appears the two bolts on the backside where it bolts to exhaust manifold are loose. One tightened up, the other just spins. Any ideas? Hoping I can avoid replacing the turbo. Is it too late, you think? I imagine that would explain poor fuel mileage (5.25mpg), and feeling like the truck runs the same loaded or empty?