I usually jack up only the passenger side and fill it to the bottom of the fill hole and re-instal the plug. Then I let it down and jack up only the driver side for a few minutes and let it down. Then check it when it's sitting level to be sure it's still full. I did it this way when I swapped to disc brakes because I wanted to be sure that the oil made it into the hubs. Mine took almost 4 quarts.