Ok so I blew my rear on saturday at the track. Long story short got the car home, got the new rear in tonight. Problem is I went to go put fluid in and I can't get the fill plug out. It looks like a simple 3/8 drive fitting should go in there and turn the plug out. I can't get the extention deep enough in the plug to get any torque on it. Is there another tool I should be using? Any suggestions?