sorry but unless you have got the proper bleed system that the main dealers have (MUT II)there is no way you can be sure its done right as you cant run the pump and get it out of there without there tool, unless you run the car on a ramp while your doing it but then you run the risk of burning the AYC clutch plates out if you run them dry of oil,Plus you need to reset the ecu and all air MUST be bleed from the system just not worth the risk IMHO, and mitsi know how shite they are thats why they insist on a service every 4500 miles
You will be lucky to get 30k out of a diff if its not serviced as per dealer requirements and i have seen loads of fooked ones !