Sonny
It’s all fun til the rabbit gets the gun.
If I mark the location of the pinion relative to the pinion nut, and count the number of turns it takes to remove the nut, is it safe to replace the seal and tighten the nut the same amount of turns?
489 pinion seal replacememt
- Thread starter Sonny
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steve340
Well-Known Member
Sounds right but when I have done I go a tiny bit tighter with the nut just to make sure there is load on the crush sleeve.
Only a fraction of a turn extra do not get carried away.
Only a fraction of a turn extra do not get carried away.
Best way to do is use a inch pound rotational torque wrench. Check the inch pounds, 15-20 for example, write it down, replace seal and use a ratchet to tighten the nut while checking the rotational force. You want 3-5 inch pounds more than what you started with.
silversedan
Well-Known Member
you can't check inch pounds when turning against a ring gear?
steve340
Well-Known Member
I agree with silversedan with the diff fully assembled you would not be able to use the inch pounds rotational drag method.
That method could only be used to set the preload on the pinion if it was not meshed with the ring gear, axles, brakes etc.
All you can do is reset the nut were it was before.
That method could only be used to set the preload on the pinion if it was not meshed with the ring gear, axles, brakes etc.
All you can do is reset the nut were it was before.
5.7 means you are taking a torque reading before you undo pinion nut. Say reading is 90 in lbs. After re assembly it should be 93 to 95 in lbs.. It to get reference point before you start.
Last edited:
steve340
Well-Known Member
Ok I understand in that case it makes sense. But why go to the bother easier to just return the nut to the original place.
You can something like that but with a crush sleeve you need to go past the old mark. If you don't go past where you were there will be no crush. It would be equal to hand tight.
Now with spacer/shims, once set, you can tear it apart all ya want and the settings will never change. That’s why with a crush sleeve, it loses its “set crush” and therefore must go past its original setting by a few inch pounds to reset the load.
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Never had a problem with taking the pinion nut back to where it was but a hair more never hurt anything either. Just don't go much more than that hair or you'll end up with too much preload. Really hate them damn crush sleeves....!
Dipstick
Well-Known Member
Or maybe the crush sleeve, being under tension, pops back a little when the nut is removed and will still be under tension when the nut is tightened to its previous location. Red Loctite is insurance.
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That's the way I've always thought about it.....
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