I agree with beenthere. I've got a couple of season's plowing snow (with the tractor...) and use 4x4 quite a bit of the time and always have front chains on my 970. The power steering cylinder is close to the right hub and the drive gear housing takes up alot of the space behind both tire rims -- chain clearance issue... But, I just bungee the heck out of them and keep them snug. Use 4 bungees on the back side of the rim and cross 3 bungees on the outside of the tire/rim. I don't usually keep the tractor in 4-wheel drive ALL the time but the chains are awfully nice to help with steering control on slippery roads and when you drop off the edge of the road while you're dumping another bucket load on the pile, it's sure nice to be able to back up and not have to drag the wife out of the house to pull my sorry butt out of the snow! /forums/images/graemlins/grin.gif
As well, I don't rush things and do most of my work at about 1500 rpm. I'm trying my best to keep both the bucket and that 7' backblade from crunching something or other, so I'm not jumping the clutch and churning the front wheels. I use the differential lock quite often if I think the wheels are gonna break traction, also. My 3-4 cents.