Transmission problem
2003 Chevy Truck V8 Four Wheel Drive Automatic 97946 miles
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Whenever I first start the truck, I get a loud hum which seems to be coming from the transmission as I accelerate. I've had this truck in to the dealership several times, and they tell me they can't find anything. It only does it when the truck is "cold" never after it's run for a while.
Am I nuts as they think, or could there be something wrong?