How badly is the leaking on the inner side of the knuckle? (round area)
Onliest reason i ask is because if you take your knuckles OFF and do the whole axle rebuild then you are looking at two solid days of work... that ain't a joke...
Doing that you need the full rebuild kit and might as well get new bearings since you're knee deep in it... The next time you won't need new bnearings because you will know when they were installed... you're most likely using the original bearings that are over a decade old...
OK. Now. if it isn't weeping too much juice out of the inside the you want to just do a half job where you pull the hubs and shafts/birfields... that'll take a newbie about 5 hours. Give yourself a full satruday or sunday. you'll need any gasket/star nut/grease associated with the hub....
i can't tell you how often I've gone this deep in before... i can tell you that i replaced my rotors Friday night, so that was the last time... the time before that was last Saturday putting in a Birfield and the time before that was two Saturdays ago when we pulled the birfield out on the side of the trail because it broke.
If you plan to wheel these beasts, you need to a) know how to pull thesse birfs quick and b) have all the necessary tools that normal tool boxes don't have... 54mm hub socket (a thin one from spector or slee, NOT a thick snap-on). The reason you need to know how to pull a birf is because the second it breaks, it's got to come out... OR you must drop the front drive shaft AND remove the drive flange. This is because they are full-time 4WD and that broken birf turning inside the hub can do major damage to other expensive stuff like the shaft or hub or even axle housing... it needs to come out.