Westech

Well Grease/Lube just use any front end grease. If you only drive it in Very cold you can get a LOW temp Grease. Its White in color and a lot thinner then the "regular" stuff. Engine oil I would run a 10w30 motor oil or even a 15W40 Diesel engine oil. Anti freeze or Engine coolant will not change from summer to winter. For the Gear boxes and diffs I would Run a 75/140 gear oil. It will be a little thinner when cold and not "strain" the gears before it warms up as much.
Happy Driving.

(I would not drive a WC in the winter.. salt, sand, all the "Nastys", I would find something else and save the WC)