84 F250 6.9 diesel. how do i intentify the axle to buy a diff lock? ive heard people say dana44, dana 50, and dana 60? is there a stamp somewhere? i dont think the axle is original.. its 8 bolt and one side is left hand thread(older im assuming?) these trucks are horrible in 2 wheel drive. one wheel on a little puddle and i have to get out and lock the front hubs.