have fun changing it, not as easy as you think lol
gurantee the top bolt is seized proper in there, and them torx bolts that hold the shaft on are a pain especially if you slip and knacker them up lol
but get it on some ramps and just make sure its the rear diff, its usually gearbox, front diff front shaft that go before a rear diff on a 4wd
but as you its at the back of the car then more than likely rear diff