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Discussion Starter #1
My truck has recently been acting up (or so I think). My turbo seems to be higher pitched than normal at cruising speed (30-35). Also, along with the normal v8 rumble there seems to be a moan or groan when taking off from a dead stop. I have noticed a streak of black on the inside of my exhaust pipe as well; I do not know what the substance is... As far as I know, no coolant is puking or leaking... Any thoughts would be appreciated.
 

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You may have a cracked exhaust pipe or loose clamp causeing a leak or a turbo oil seal may be leaking. Any smoke? Other symptoms?
 

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Discussion Starter #3
A tiny bit of light smoke on startup; clears in about 10 seconds. Also noticing some vibration/grinding noise when letting off the gas but it may be unrelated.
 
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