I have recently moved to a town house and have not been able to go off roading since the winter. I recently dropped my rover in 4 wheel drive low and drove for about 100 yards, just to make sure everything was operating correctly. While driving I notice a good amount of humming from the transfer box when I got to about 8 to 10 miles. (I have never driven it in 4 WD low on pavement but this was the only place I could drive like this legally.) I know this is probly normal but I just wanted to check with you guys first. (I am going off-roading in upstate New York this weekend and want to make sure everything was in good order.