Does your machine have an incline auger in the tank, or the straight across transfer auger? If it has the incline, there is a double universal joint where the auger hooks up to the drive splines. They are a non-relubricable(sp) cross and cups. It is allways a good idea to check those every year.
Also on the unload auger, have you looked it over really good? Make sure the bevel gears are in good shape and not too much lash in them? How about the upper elbow gearcase? Did you grease it, and check the pins where the augers hook into it to make sure the cotter pins are good? I allways check the unload auger over a little extra. There's a bearing behind the big pulley that needs to be checked, and the bolts around the bottom of the vertical auger should all be checked for tightness. Otherwise the drive chain can skip teethe and when that happens, it can get nasty really quick.
Other than that, the alternator is about the only other trouble spot. Jon Hagen over on agtalk made a nifty little gadget that keeps his alternator clean and working the season long. It is made out of a couple eve trough elbows. Ask him about a pic of it.