Not difficult, HOWEVER you need a 14 m allen wrench socket. I made one by grinding down a 9/16 allen wrench and then inserting that into a 9/16 socket on my torque wrench. It took me a hour to cut a 4 inch length off an allen wrench with a hacksaw. (Not to worry I have four more of those allen wrenches.) 37 ft. lbs. I also have a mytivac which I used to inject the new oil into the differential case. If you do not have one you will have to find another way to get the new oil in the fill hole. The exhaust pipe is something you need to work around or remove. It takes about 1.2 liters so I bought 2 quarts of Valvoline 75w-90 full synthetic.