We've also got a twin auger IH #80 and although it hasn't hardly snowed in the three years since I bought it I've used it enough to know that most tractors don't have a slow enough reverse gear.  I'm in the process of putting a loader on the 1066 we will use on the blower so in deep snow I can put the tractor in neutral and use the loader to push the tractor slowly backwards of need be.