Re: Awwe Crap!
As has been stated before--The key isn't there to drive the hub. If the key sheared, the hub wasn't tight enough. The friction between the taper on the axle and the taper inside of the hub is what is supposed to move the car.
IF it was loose enough to shear the key you really need to make sure there is no crack beginning at the inner end of the keyway.
I never take the nut right up to max torque first . I tighten it up really tight, drive around the block and tighten again--do this maybe 3 times then use your cheater bar or torque wrench and move the nut to the next slot where it lines up with the hole and insert the cotter key. ( use a felt pen and draw a line on the end of the axle so you know where the cotter pin hole is.)
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