We had a break in the weather and I got under the rig for the first time today. What I found was alot of hard dry grease/dirt from the ends of the axle tube to the back of the dust cover. I have no documents from the PO. If they were with the rig, the dealer cleaned everything out of the glovebox. Can you replace the cage and ballbearings inside the Birfs, or do you have to replace the entire part? Of course I don't know if there is anything is wrong with mine, just wondering if it can be done. I found the front axle rebuild kit at MAF, but if Dan's price is close I will stick with OEM.