Also, read this thread for a DIY tool to INSTALL the new axle seals:http://www.jkowners.com/forum/showthread.php?p=425844
The seals cost about $25 at the Jeep dealership.
When you re-install the axle shafts, be sure to put a glob of grease on the ends of the shafts (on the threaded ends going into the diff) to protect the new seals from getting shredded.
DIY, takes about 2-3 hours. And DON'T forget to add new differential fluid when done!!!
If you have sleeves inside the axle, it gets a little more complicated. I can't get my seals removed. I think Jeep welded mine in. D'oh! Taking it to the guy who did my gears to have him replace the seals. That took about 3 hours of frustration to realize this.
2008 2-dr Rubicon, auto,
RK 2.5" Max Travel lift, Fox 2.0 shocks, 37" Nittos, 5.38 gears, River Raider skids, Warn VR8000-S.
RIPP Gen 2 Stg 2 Supercharger.
Bunch of other junk.
"Y'all kin say whut y'all want 'bout the South, buy y'all never heard o' nobody retirin' an' movin' North."