The old Kodiak didn't have that button and it is more like a 3 wheel drive vehicle if one tire gets up in the air. The only good news about that is it is so light it is easy to get off the hummuck...  I don't know about the newer ones (For one, the newer ones have IRS whle mine was a soli rear axle).. Lucky for me the Polaris doesn't get stuck to easy... Because if it did, that sucker has some weight to it.