Noise Conditions

Final drive noise - a howl/whine related to vehicle speed and is noticeable in all gears.
Gear noise - a whine that is due to gear contact that is related to a certain gear and vehicle speed. The noise disappears after an upshift. The noise is usually "gear profile" related.
Gear clicking noise - ticking noise observed on every rotation of a gear pair that is usually caused by a "nick" or "ding" on a gear tooth.