Last night I heard a rattling coming from the front of my 96 FZJ-80 when I was driving. This mornig when I looked where the truck had been there was a pile of xle grease. I just replaced the seals, bearings, rotors, brake pads, etc 8 months ago. Basically I did a whole knuckle rebuild. So why in such a short period of time would a seal go bad and have such major grease loss? I really had no plans of re-doing seals again for a while. Any thing I should take note of this time?