could one of you buick nuts out there give me some imput on how much Torque I Need To Tighten The Pinion Nut To Get The Proper Pre Load,Its Not A new Rebuild Just A seal And Yoke Replacement, Thanks Boston Buick
preload If you are just replaceing the seal... you should just lock tight the nut and tighten it down as much torque as you can with your hand wrench. The preload should be alright as long as it was good before you changed the seal. New preload only needs to be done to the bearing when you switch gears and change bearings. Hope this helps. Oh make sure you grease that seal up before you put the yoke back in or you'll have to do it again real soon. Jim
When my rear axle builder gave our Buick club a tech session, he showed us how to determing pinion nut torque. Tighten the nut using an impact gun and take a pinion torque reading by spinning it while you have an inch-lb racthet attached. For a simple seal change, you use an inch-lb torque reading of 10-15. For a new crush sleeve, you want a reading of 20-25 inch-lbs. I believe this is also stated in the shop manual
yup-yup, with the carrier out. Just doing a seal, I've marked a couple before turning the nut-done the seal and brought it back to where it was-worked out ok-
torque Guys you are not recrushing the sleeve... Your just replacing a seal. This has nothing to do with the torque you are talking about. You will not recrush the crush sleeve by hand...unless your quite a super strong guy that can apply 125lbs. of torque with a standard 1/2 length wrench... If the crush sleeve was crushed correct before then it will stop at the correct torque needed. That is what the crush sleeve does it keeps the 2 inner and outer bearings from being over tightened and sets the preload of the bearings when you are resetting gears or installing a different gear. So if it was correct, then just lock tight the nut and be done. TOO MUCH THINKING HERE. If it was NOT correct...then you might want to start over with a new crush sleeve (which requires a complete tare down) and find your self a lift. Doing it on the ground will be a pain... Do not use a air gun to with alot of torque or you will be sorry. Good luck, Jim GStage1 Your confusing the nut torque with the bearing preload torque. The bearing preload torque is in inch pound as you desribed the torque on the pinion nut does not matter as long as the sucker is lock tighted , peened etc. so it does NOT come off and of coase tight enough to keep the bearing back to its original seated position against the crush sleeve which if it was good before the seal change will be the same again as long as you do not over tighten it and recrush the sleeve...Then the bearings will be wipped out .
