Stubborn Pitman arm

return tool, get new one,get better one if they have it, clean threads, oil threads, heat piman arm (careful dont heat seals in steering box) PUT DOWN IMPACT! use slow even force with large breaker bar, when you think you have enough force on it, go a little further, then give the bolt going through the puller pressing on the shaft a GOOD SOLID HIT with a B.F.H. (big $#@%&*^ hammer) then repeat, tighten, hit, tighten, hit, before you go return the old puller soak the pitman arm and shaft down with liquid wrench or the like