I have a 2008 John Deere 9530 four wheel drive, During maintenance this spring I found almost a handful of steel filings in the front differential. It is a well cared for unit andwas wondering what caused the bearings to go. Was never low on oil and Never pulled a scraper. Tranny and back diff was clean. Diff job is costly around 14-16 grand. Yikes! Just wondering if any one else had this problem. Was not a nice way to start the spring, but least i caught before seeding.