you need a 3/4" drive ratchet & socket plus an extension bar, make sure you chock the wheels as your going to be swinging on this extension bar. mine was a manual so i just left it in gear and chocked the wheels to stop the engine turning. i have heard of some people fitting the 3/4" rachet and locking it against the chassis and then flicking the starter to undo the bolt but personally think this is risky..... up to you