I have a 2nd gen Milwaukee Fuel drill model 2704 and am having trouble replacing the Chuck. I know the correct way to do it, and have removed the left hand retaining screw (torx 40). I used my fuel 1/4 impact and even twisted one bit holder doing it! But now I am using a 1/2 Milwaukee fuel impact to remove the Chuck ( I have a 3/8 Allen socket to a 3/8 to 1/2 socket adapter) the problem is the impact is turning the motor of the drill, so I can not get any real torque on the Chuck. I also heated the Chuck with a high temp heat gun, no dice. I currently have penetrating oil soaking in... see if that helps. If not I might get the grinder out. Oh yeah I got a Rohm rv going in its place, stock Chuck is not impressive. Thoughts?