5/8" lug nuts need about 120 ft./lbs. of torque to stay tight. The purpose of torquing a bolt or nut is to stretch the thread slightly, but not beyond the metal's elasticity. You're probably not tightening the nuts enough.
Jerry


"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!