Chevrolet,Gear oil leak.

The pinion bearing and pinion oil seal are bad. It is leaking a considerable amount of gear oil out the front yoke and began making a heavy rubbing noise. It is also idling rough like running over rumble strips. I removed the 14-bolt cover plate on back of the rear differential and drained the remaining gear oil, which revealed no metal fragments.The ring and pinion gears showed no signs of damage (no chips or scarring on the teeth).