Originally Posted by woptang22
So I should do a log of third gear switching into fourth gear? What would that show that just a third gear run wouldnt show?
Correct. I'm afraid I don't know the answer to your question, it's just what I've read. My guess is that a single gear (especially a lower one) doesn't put a high load on the engine for very long. getting 2 upper gears worth probably presents more opportunity for a timing correction or some other issue. I'm sure some useful information can be gathered from the gear change itself as well