Hello Larry:
The truth is that the lawn tractors under $2,000 are designed to be price competitive and cut grass, not to push snow or pull attachments. If you really want to push snow or pull a heavy load, then you need a better transmission which is now in the more expensive mowers like the John Deere Select series or the Cub Cadet 1500 series. True garden tractors will also do the job for you and of course are also more expensive... Now don't blame the manufacturers... over the past 10 years, prices have not gone up dramatically and now you get more for that money like a wider deck and foot operated hydrostatic transmission. To stay competitive, they had to size transmissions to what most users do - mow grass. Very few push snow.
Peter Sawchuk