More info...
Light acceleration, hard acceleration or any...?
Is the jerking sudden?
Do you feel the front push or the rear move?
Do different road surfaces make a difference?
Is it always toward one side, or does it change?
Any sounds?
What happens when you decelerate with the clutch engaged?
Did this happen all at once or a slow change?
What was the last thing you changed before the symptom showed up?