My Truck is a 2001 Tundra 4X4 with a 4.7 and low mileage.. I was wondering if the front axles turn while in 2WD. I assume the front hubs disengage totally, but I don't know for sure. I am asking this because I found a slight seeping of grease in one of my front axle boots, and if they don't turn any in 2WD, I won't worry about fixing them for a while. I seldom use 4X4 outside of hunting seasons, and then it is at 5 to 10 MPH tops. Thanks..