Thanks guys yea I've always stopped for every change but my old bus was 24 years old and well old but the new is a bit different ,I think the problem I had was that I was pushing lever down to much as in saying that I push it down to select low or high but no sure switching between the low and high do you still need to push it down or just shift like normal .i only had to change 4l to 4h a couple of times but as I said I'm new to the auto .so I dare say its best just to stop select neutral and change as needed I get it next time I'm sure just hate to grind especially when the wife is next to ya saying nice one nob nuts