We had a couple of the older 550F long track models, pogo stick front suspension. 2 speed + reverse, never any transmission problems. The only thing, if the snows real powdery and deep, bring a squeegy to keep the windshield clean. We even had the wide skis but they are heavy and didn't want to ride on top of the snow. Other than that, very good machine. Unfortunately they bought us 2 new Arctic cat Bearcats, 550F, what a complete lump of whale crap. weak, slow, horrible gas mileage and steers like the Titanic. We have adjusted for full weight on skis, no difference. 15 miles took 1/2 tank of gas around 6-7 gallons. Good thing I don't pay for the gas, otherwise they would never leave the garage.