Snowblower question-Blower impeller works but the auger blades dont on a craftsman Blower, What is the Problem?
2 stage Sears Snow blower - Upper stage to discharge works great but the lower auger spins free. I believe the problem to be in the gear box...Any other suggestions?

There is a shear pin on the shaft to the auger. I would check that first. It is the most common culprit of your situation.
This might help you also.
http://everything2.com/index.pl?node_id=1794867
Locate old shear pin and head to nearest Sears store,,they are usually in stock in Lawn & Garden. Or type in "shear pin" on sears.com website for several choices..OR,,,enter SearsPartsDirect website with your entire machine model number to see a diagram and order part you need. Spring is almost here,,,Finally ! Good Luck.
Link for a typical shear pin: <http://www.sears.com/shc/s/p_10153_12605_07188289000P>