well, if I ever have to change my wheel bearings or axles, I have THIS bad boy at my disposal: Shop Kobalt 1/2-in Air Impact Wrench at Lowes.com

except mine is a bit of an older model, but it still has the same specs of 350 Ft. Lbs of Torque, Twin Hammers, 3 Forward Speeds and one Reverse, and the Tease Trigger for more Precise Control.