I have a Gen III (Out of a 2005) rear differential complete with case for sale. Had 14,500 miles on it. Everything was in good shape except for the spider gears. Couldn't find just the spider gears 3 years or so ago so we bought a completely remanufactured one unit. This one also has a set of 3.73 gears that are basically new. I do not know if it is worth $500 bucks for everything, but I am in Dayton Ohio if anyone would like it. Trying to clear out space, have too many parts just sitting around. Thanks! John