A guy I work with has a '01 Ram 1500 4x4, and it's leaking oil from the end of the axle tube on the passenger side. Is this likely just a seal that went to hell, or is it possible that he might have some serious troubles? I want to ask anyone here if they've replaced these seals, and if so, what the job consistes of. Is it something that can be done on a Saturday afternoon with a decent set of tools, or is it best left to the professionals? BTW, the truck has over 100,000 miles, and is driven agressively, but it doesn't get offroad all that much. Any input, advice, or opinions will be greatfully appreciated by both of us.