Had my p500 for about 2 months now. Noticed a noise coming from the rear differential. When you are in between coasting and putting power to the engine, you can hear a clunking noise coming from the rear differential. This noise goes away when putting power to it or if the engine slows down the machine. Took it into the dealer, and he called Honda and they said it is normal. The machine only has 19 hours on it and about 160 miles. Is it possible for this noise to go away after more miles and hours? Just a little concerned. I am used to the noisy shifting, but with more practice on my part, the shifting is much smoother for up shifts. Down shifts are another matter.