I've been reading a lot on this topic and based on what I can comprehend, one, if not the main reason, is low or no vacuum. Since I am not a mechanic and do not have the tools to test the vacuum and from what I can tell everything in the car works fine, other than the 1-2 hard shifts, am I being too simplistic by just replacing the hose leading to the transmission? My rationale is either there is a crack or obstruction in the hose resulting into no or low vacuum. Also, I was looking at the engine today and it appears that the hose (about 1/4" round) just "snaps" and there are no clamps at the connections. Am I looking at the right thing?
As always, any advice will be greatly appreciated.