people get hung up on the ease of using impact guns, air or electric and forget that it's nothing more than a hammering action on the fastener and threads. impacts are fine for large, heavy duty fasteners that are put on with high torque values and for rusted items. The clutch and variator nuts are not high torque, have limited thread width and should be put on and taken off with hand tools and set to correct torque. if there's a way to do it with hand tools, that should always be the first choice. impacts are a last resort. if you look close at the threads in either the nuts, or on the shafts, if you've been using an impact, you'll start to see very sharp edges on the threads. one day you'll tighten it and the threads will give up. if the shaft threads go away, it's a wasted crank or clutch shaft.
The bearing/seal drivers are nothing more than aluminum or plastic discs that have a driver handle that goes in a hole in the center to hit with a hammer allowing square pushing on the bearing or seal to avoid getting it jammed in its race. good item to have, any auto parts store has them, usually 6 different size discs per set and not at all expensive. I probably have 4 or 5 sets of the things floating around .... otherwise, an appropriate size socket on an extension is what most people tend to use.
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