On occasion, my car (2004 Sentra SE-R Spec V) makes a very odd noise when letting off the clutch and pressing the gas and continues to make it until the clutch is fully released. It only does this when taking off from a stop. The only way I can think to describe this noise is that it sounds like a door opening with really old rusty hinges. Does anyone know what this could possibly be? I can't get the sound to duplicate for a mechanic because it only does this on occasion.