I know this has been mildly debated before. My guess is 420 pounds for one that is complete with the big drums, 3.73 gears, gear oil, and a Gov-Loc. The highly scientific method I used was - Weigh empty truck on a scale about 3 miles from the shop. Drive back to the shop and load the 14 bolt. Drive back to the scale and weigh the loaded truck. Drive back to the shop and unload the axle and disassemble it to sell the parts. The weights were 5380 loaded and 4960 empty.