Help with recent slice...

Ok, so I used to slice my driver HORRIBLY. I got an R7 Draw, and I was hitting dead straight with it for a month. I now HORRIBLY slice my driver, and somewhat slice my 3 wood. I'll even occasionally slice my IRONS, which I usually draw!

My dad was watching me, and said it looks like I have developed a bad habit of coming too far "over-the-top" on my backswing, and need to come more "around." Would this be a cause of a slice? I'm fine with slicing my driver, as I consistently put my 3W past it, but if I slice my 3W aswell, I'm gonna start having problems.
Thanks!

I think the phrase

over the top is over used, and used incorrectly very often. An over the top move occurs during the change of direction from backswing to downswing. If you believe you have a faulty backswing position that is not being over the top . There is a straight slice (where the ball starts on your target, and then curves away), a pull slice (where the ball starts left of your intended target, and then curves away to the right), and finally there is the push (or block) slice (where the ball starts right of your intended target and curves even father right). Which of the three is the most common error for you? If you have the slice that starts to the left and then curves to the right then that means your path near impact is approaching from outside the ball to target line, making contact with the ball (with the club face aiming right of your target), and then swings inside the ball to target line after impact. However that does not mean that you are swinging over the top . Even if you're making an over the top move during the downswing that doesn't tell you what is causing your problem. If you seek long term improvement you'll be better off looking for the cause(s) of your problems instead of making compensations to correct for them after they happen. One of the best ways to see what is happening in your swing is to record it on video. With video you'll be able to see your own swing reducing the likelyhood of a communication error leading you down a wrong path.