Ok, I did it, changed the front and rear differential fluid, and it was fairly easy even for an electrical engineer

I had to order Royal Purple over the internet, as I could not find around here. I also had to buy a 24mm socket wrench to remove the rear drain and fill plugs, and the front fill plug. The front drain plug is a 12mm. All wrenches could be regular box wrenches except for the rear drain which is recessed.

I did not go for the fluid pump, but just bought a 60 cent hunk of plastic tubing, part of which I duct taped to the gear lube nozzle, acting like an extension so I could reach the filler holes without making a mess. The other part I used as a siphon so I could remove the fluid that does not drain by gravity. Did front and rear in about an hour.

Grrr, I am pumped now, what's next, ahh, me thinks synthetic tranny fluid....