if someone has tightened that bolt on the gearbox, GOOD LUCK GETTING IT OFF
somehow, me and my bro got it off after about 20 mins, we had an extension bar on it, and both of us where under the car, i had my foot on his foot, and we were both really straining to get it undone, but after some popped veins we got it cracked.
but like others have said, you can fill it from the top on gtst's but not in gtr's