i have a 1950 chevy, and the 2 speed rear differential looks like a timken, but according to this site (an old thread) the timken axle had bolted on axle shafts, and corporate axles had double splined shafts. mine has the splined outer shafts. but the pumpkin is very square, and has timken cast into the side. so what's up? anyone have a manual that shwos the different axles?