I did this last week, and if you have big hands be prepared to get custs and scratches all over them! One bolt on the top on the bell housing by the gear linkage, flexi extension head is a good tool for that one!
Then the other 2 i did from underneath the car while it was on ramps, they are all 13mm bolts, disconnect the power and earth supply, 2 10mm, and pull out! Takes about an hour or so to get the bolts out then it is very easy!