Use it hard, maintain it more often
I'd second that recommendation. Back home, in old West Virginia, we had to cross creeks many times during heavy rains. That was back in the old days with jeeps 'n such. Always had to drain and refill axle pods and repack wheel bearings several times a year. 'Course seals are much better now, however, I wouldnt chance it in case one leaked. Its the cheapest maintainence you could do and it will tell you straightaway if you took on water. Dont wait to long after the fact! GregH