I found some brass in the oil when doing the maintenance on my 07 M8. The dealer replace the drive in 08 and it has about 600 miles on it. Just last year I changed the planet in my other sled no big deal, but I can't seem to get this one apart. Does anyone have pictures of how to take apart the gears? I know you have to pull a bearing to get started, but did Cat change the drives from 07 to later in 08?