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Leaking oil quite badly and when I get into the throttle and it gets over 3k I lose significant amounts of power and humming noise starts. Any ideas on what it could be?
Like Rusty ask, do you know were on the engine/truck the oil is dripping/leaking?
Without knowing a little more...like do you have any idea where the hum is coming from? Kind of hard to help on that one...is the truck moving or will it hum sitting still?