[arpad_m]

Originally Posted by getchapull

Thanks.

I wonder how much a 3" extension will reduce a 150 lb torque value?

My memories of middle school physics are fading fast, but why would it change the torque value that the wrench reads? Extensions help you, that is, your muscles by allowing the exact same torque via the application of less force over a greater distance. There is no change to whatever torque value the wrench reads at the lug.