I am starting to replace the pinion seal on my 1985 K4 rear axle. I measured the preload rotational torque to be 1.2 in lb CW and 1.1 CCW. Seems too low. Spec I found in another thread is: Pinion bearing preload new 20-25 in. lbs. / used 5-15 in. lbs. I measured with rear wheels and drums off. Pinion shaft has no play sideways or in and out. I can feel some back lash when I turn the pinion yoke, normal. When I reassemble the pinion I'll try to return to same rotation torque adding 1 to 5 in lbs for drag caused by new seal (according to Haynes manual). Perhaps my preload is so low because my gear lube is low. That's why I'm replacing the seal. Any comments?