left knee snapping straight

[threejack]

I've got this habit of snapping my left leg straight occasionally at impact. it stops my turn and my hands through and i double cross. anybody heard of such a problem and any drills to help? thanks

[Stretch]

Straightening the left leg, in itself, is not going to stop your turn. In fact the leg has to straighten to release the hips to keep rotating through impact -- players who keep too much flex in the lead knee almost always hip stall and cut across the ball to the left.

I'm guessing that what's happening (if by double cross you mean you hit a snap hook) is you're straightening the knee too early , before you've got your weight forward enough. This early extension is going to back your head up and send your club path way to the right -- so with anything close to a square face at impact your ball is going to be curving way to the left.

Try and feel like your left knee stays flexed longer in the down stroke and that you are pushing it outside your left ankle as you approach the ball. Then stand up all you want in the follow through.

[TN94z]

It's just something you will have ton concsiously work on.  I used to do that and it can be stopped.  Straightening your left leg and it snapping to a locked position are two different things. It sounds like you are doing the same thing I was.  I don't know of any specific drills other than just taking slow swings and getting the feel for not doing it. I don't do it anymore, so I know you can stop