I haven't felt the shaft saver in my Mav yet, but when i had my commander I felt it all the time. Especially when climbing tall steep dunes, sometimes when jumping or power sliding, pretty scary when your power sliding and the throttle lets off - . I ended up putting a K&T black box in the commando and cured everything. But I was told it wouldn't work with the Mav so i sold it. Like I said I ride in the exact same places/style & haven't had an issue yet. Curious if you guys are just noticing it in the mud, 2wd/4wd or when just riding hard w/normal terrain?