Here's a good Craftsman auger /impeller gear box that came off a 1979 Craftsman 5/22 two stage snowblower.  This assembly fits many other Craftsman and Dynamark 5/22 and 4/20 models as well, so please check your applications. See pic. 21 for model id. Parts # 50217 & 50218.  This auger gear box still worked well on the blower.  It installs tightly to the auger and impeller shafts and securely mounts with the included bolts.  The gear box will allow for the axle to spin out round with some light normal run-out common to these.  The gear box shows some light normal wear and will engage the impeller and auger shafts well.  One auger shaft seal shows a partial tear (pic 7), but can be used as is or replaced.  The other side is solid.  Nice to have a spare in a pinch when one is needed!  These OEM units are getting difficult to find anymore in good working condition. Look for other good parts from this vintage Craftsman 5/22 blower as well.  Please thoroughly clean and lube prior to use.  Look for more good snowblower parts in my other auctions.  Please look at the pictures.  Ask any questions that you might have.  Paypal payment due within 48 hrs of auction ending.  Securely packaged and quickly shipped.  Thanks for looking.