The auger in ice bucket was frozen and locked in place (some how liquid water must have spilled inside and froze the shaft and bushing). When the motor was activated to deliver ice, the jam caused the motor shaft to strip the threads. With the threads stripped, there is no way (that I could find) to get the drive auger off of the shaft (btw, it is left-hand threaded). Apparently the Drive Auger is made of stainless steel - a harder metal then the motor shaft.
To repair it, I removed the motor assembly and cut off the Driver Auger, by slitting it on one side (using an oscillating multi-tool with a metal cutting saw) and used two adjustable wrenches to bend the part away form the shaft. This is not an easy task to do. It takes a careful hand to operate the saw to keep from damaging the shaft and significant strength to bend the part - although you could cut both sides and not need to bend it.
Now, with the old drive auger removed, I needed to place a spacer (I used two thick washers) to keep the new auger from returning to the stripped part of the shaft. Fortunately, there is lots of slop in the depth alignment, and extra thread length on the shaft to allow the replacement part to be installed a little higher up the shaft. But, I had a little more work to do since the washers I had were not sized right. I needed to drill the washers out a bit to get them to fit over the shaft. Finally, with the washers in place, I put on the new drive auger and it worked great. BTW, you don't need to worry about how tight you put this on, it will naturally tighten when it spins to deliver ice.