yes the alignment tool works but the shaft still is too large. i even used just the input shaft off a old drive with no u joints still would only go in to 1/4 before double o ring at the u joint. the bearing is in all the way also even around. the mercury hp dealer installed it i will try again tomorow.is their two bearings for this app.? my engine alignment is perfect my old drive would fall off when you took off the last nut also went on like butter.