The new pinion nut is gradually tightened down until there’s no back-to-front play left in the pinion. At this point, Bruce slowly tightens the pinion nut until he feels a slight drag while rotating the yoke. Then he uses an inch pound dial indicator torque wrench to measure rotating torque, which equates to pinion bearing preload. If the pinion is difficult to turn, you might have the pinion nut too tight, which can lead to premature failure. If that happens, you would need to remove the pinion and isntall a new crush sleeve/collar, then re-torque the pinion gear.