I have a 95 dodge ram 2500 v10 4 wheel drive, the front drivers side axle shaft seal is leaking, last year I replaced the hub assembly so I am some what familar with the set up. has any one replaced the seal? do I need special tools? I know the seals are internal can this be done through axle shaft or does differential need to be removed? the service manual seems confusing . THANKS

well, I hate to say it, but yet, you will need to remove the differential.
check out this site, it has good instructions, as well as pics.
http://dieselpowerman.tripod.com/Front%20Axle%20Tech/Front%20Axle%20Tech.htm