While sandblasting my D60 I found numerous tool marks and numbers that would normally never be seen, but show up very clearly when the axle is stripped to the bare metal. The one that really has me interested in what is means was found on the diff cover. 72187X followed by the Ichthus symbol(fish symbol). Anybody have any ideas as to what it means? Derf00 "A WISE MONKEY NEVER MONKEYS WITH ANOTHER MONKEY'S MONKEY."