I was parked on the side of the road, and started the truck, put it in drive, and held the brake and gave it 1/4 pedal to see some balck smoke, then i tried to drive away and the rpms went real high and the truck didn't move. Then cycled through the gears again and it went. then @ a stop sign it did it again. made it home and the tranny was a qt low, so filled it. Could the tranny be near the end of it days and its time for a rebuild?