The Stovebolt Site Forums The Parking Lot '60-'66 Trucks 4x4 steering knuckles question

I had a 67 chevy k-10 and it had the Dana axle and used 140 wt gear oil. Same as the mower gearcase for my Gravely tractor. My 64 GMC 4/4 3/4 ton calls for 140wt in the axle ends and 90wt in the center of the Dana axle.