I have an '82 air cooled vanagon. = It jerks, shakes, hesitates, bucks when it reaches around a certain rev, just = about when I would change gear or reach the cruising speed. Last year it = did not do it, but other than that it did it for the last ten = years. I tried numerous things and I could not stop it. Sometimes = its worse than others.

Is it a thing I can ask the list to = ponder over and be successful solving?