Finally got around to doing this today and of course I forgot to take a sample.
Not as easy as an oil change and a bit messier but overall a nice little DIY project so you can spend time in the garage with your other lady.
I will mention that the original washers were identical to the silver ones I posted awhile back and to be honest they looked completely re-usable. I went ahead and used the new copper ones that Z1 sent with the order.
Up next will be the differential.