I run 3 most of the time and have jumped to 5 once or twice. I have put around 30k miles on it with the smarty and don't have any tranny issues yet.

 

I changed to SW7 today. Just cruising around town, nothing crazy. I like it so far. I try to hold back on upping the power b/c I get greedy, and I know sooner or later my greed's going to turn into a broken transmission.

 

I put 50K on mine with quadzilla on 60HP the last 25K of that was with 40HP injectors 1/2 my mileage is with atleast 15K behind me. I have run smarty on #3 for 6K and make more power. Trans has 106K on it and is dying now, probably of natural causes like never having the oil changed.....