Flight pattern changes depending on club- help!

[safetrip]

I've recently improved on the weight shift on my swing so seeing on improvement on consistency and distance on all of my clubs. The only problem is that there is this pattern where on my short irons, I tend to pull or hook. But as the club gets longer to be mid irons, it goes straight as an arrow. But my hybrids and driver tend to go the other side with push or slice. One important detail may be helpful is that when I hook, the ball starts left and go further left. Conversely, when I slice it starts right and go further right. Or they just go straight left for pull and straight right for push.

I know that there are a number of different reasons for hook/slice but I thought since there is pattern depending on the length of the club, there could be a one main cause.

One thing that I'm suspicious of is timing between arm and lower body being off. Could it be that for short irons, my arms are moving faster than optimum and the other way around for longer clubs? If so, is there a good drill or swing thought to work on?

[Lean, Mean, Hitting Machine]

The shorter in length the club (short irons/wedges), the higher the loft and steeper the swing path. The "correct" path of a wedge is much steeper than a driver or hybrid because you are closer to the ball; therefore, most novice players get away with a steeper/over-the-top swing with these clubs. Longer clubs require a flatter swing plane; not only do most golfers have too steep of a swing path, but they have a hard time getting the face back square when using longer clubs (requires more strength or a stronger grip with constant grip pressure). Make sure you aren't opening the club face by breaking your wrists right or left on the takeaway, for this will most likely leave the face open at impact. Consult a pro with a camera to get your plane figured out; also, make sure to keep your shoulders square through impact with a straight left arm throughout the entire swing. Don't focus too much on turning over the forearms because that should happen naturally in the swing. Hope this helps.