Tips Plus: Jim McLean (August 2010)
A good grip is critical to hitting the golf ball well. A fundamentally sound and natural grip will give you the best shot to hit the ball solidly and consistently. If you are having trouble making consistent contact and are hitting the ball off line, check your grip first, swing next.
Often times people try fixing poor timing and bad club-paths by making their grips unnaturally strong. When this happens, by not fixing the problems directly in the swing, this person now has a faulty grip besides bad timing, and a bad club-path. If it is up to me as a teacher, I'll be patient and do what is necessary to train better timing to the student's swing which will help the club path and then the swing will have improved without screwing up their grip in the process.
Take a look at this link to Stina Steinberg who helps explain why you need to grip the club properly.
Good Golfing to you and God Bless!