Stripped pipe threading for shower diverter stem - what to do?

if i understand the question correctly--with a tap & die set--tap some new threads into the female fitting(use some light oil-even wd40)--then use your die (with the oil) to make your threads as long as you want--use pipe dope covered teflon and rethread--just don't over tighten the fitting-good & snug is good enough--hopefully it will keep you from tearing out the wall