I don't know...My stock Rugged Trails did just fine, and I had to drive through the thick of this blizzard on Wednesday, and dealt with the aftermath yesterday. Farking airline cancelled the flights I was supposed to operate AFTER I drove 45 miles to the airport. Just left it in 4hi and plowed through 2.5 foot drifts with aplomb. About to snowshoe 1/2 mile out to where my truck is parked to go back to work. Try to commit aviation again today.
Of course, none of this post should be contstrued to think I'm not going to buy some A/Ts just as soon as possible.