HT20 uses Sunstrand and a different bull gear setup than does the 1886 with it's Eaton 12. Perhaps that is where the difference lies.Wilberj, any idea why the HT20 will, and the 1886 will not? or why my HT23 does most of the time, but not all of the time? I've always wondered. What I can say is that it's a million times better than the Cub 2072 super garden tractor that I had. That tractor had an alloy rear end and got stuck everywhere.