Got up this morning to do some blowing and discovered that both the impellers/augers are freewheeling. The Toro site says this model does NOT have shear bolts. But on this forum and other sites say it does have shear bolts. So assuming it does not have shear bolts what else would cause this problem? I'm thinking it has to have shear bolts because what else would keep the impellers/augers from rotating on the shaft? I am definitely confused. Thanks for any info (while the snow piles up another 2 feet in the next two days).