Quote Originally Posted by Irving View Post
That's exactly the point. The only tool that should be used is one that will tighten to the correct torque. If the tech is in there playing Nascar with the impact gun, the vehicle owner is going to get into a fight with the poor person who tries to take the whhel off next when the studs break.
Then you may want to pick the fight with the car maker. They don't use hand tools to tighten things, though they will use torque wrenches or other torque measuring devices to verify. Impact guns only tighten as tight as you allow them. Whether you use steady twisting power, or short impact bursts, they tighten the same. There are plenty of ways to prevent over-torque using the impact gun. The guys that come in wanting their lug nuts taken off and put back on by hand are never the ones who do it themselves, and rarely willing to buck up and pay an increased labor charge for the increase in manual work. Trust me when I say in 20 years of assembly line work and auto repair work, I have never over-torqued a nut using a gun to install the fasteners.