should be a fairly easy removal and those seals should be fine. Just inspect the shafts when you remove the diff cover and look for metal burrs or fragments- things that might catch or tear the seals - otherwise they should just slide right out... most likely you'll be fine.
one of my seals leaked on my 99 after pulling the axle shaft. so they now have to come back out agian for me to replace the seal. If you are so inclined to pull the diff cover off and the carrier out its probably adds about half hour more work to replace the seals when the axles are already out. Look up some of the how tos on this forum. but if your carefull and they are in good shape you should be good... Should be.
The diff. cover doesn't have to be removed to replace the axles, but it does to replace the seals.
'95 XJ country edition, 4" coils/3/4" spacers, HD leafs with extra main added in, Ironman adjustable control arms, rough country shackles, aussie locker, JK rubicon shocks, 35" mudder's, soft 8's, cobra cb
Sold '00 TJ, 4" lift, rusty's adjustable control arms, skyjacker shocks, rock krawler adj. trac-bar,rugged ridge SYE and RE driveshaft, soft 8's, 35" mud king xt's,XJ HP D30 w/aussie locker, 4:88 yukon gears, hella 500's, rock crusher diff covers
4. 04 Dodge ram 1500 quadcab, yes, it has a hemi.
5. '08 BMW X3, Mods in progress.
you don't have to pull the diff cover to pull the axles. But... since you're replacing the other parts an inspection and a fluid change can't hurt - might be good to know that everything is running smooth in there.