I'm putting a locker in the rear axle of my truck. When I pulled the differential out, I noticed there were some markings on the pinion gear, just wondered if anybody knew what they meant. It looks like they were hand engraved.
I'm not too swift at picture taking, but the engravings are: "+3" at the top, "K" on the left hand side, "0" on the right, and "217" on the bottom.