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Thread: Pinion torque specs?? Plz help
10-04-2009, 12:34 PM #1
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Pinion torque specs?? Plz help
I have a 1993 Suburban K1500. It's got a 350 with a 10-bolt rear end. I have a leaky pinion seal and housing seal so I am planning on replacing the seals in the very near future.
Problem is I need to know what to torque the pinion to after I replace the seal?? Can anyone help?
10-04-2009, 01:33 PM #2
10 bolt pinion torque spec
when assembling the pinion into place, include the crush sleeve between the two pinion bearings. This sleeve must be replaced every time the pinion nut is torqued. Many mechanics use an impact gun while others insist the nut should be torqued by hand. Either way, the nut should be tightened to produce 24-32-in-lb of torque to turn the pinion gear with a new bearing. This is without the ring gear in place.There is no way to happiness....happiness is the way.:yipi:
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10-18-2009, 08:03 PM #4
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Thats it?? 24-32 INCH pounds?? I thought the pinion nut would be more like 50-75 FOOT pounds? Is that really all it takes? I figured since the drive shaft has all that force going to the pinion, it would need a lot more than that...
10-19-2009, 12:01 AM #5
The inch pound rating is the force required to turn the pinion after the crush sleeve has been crushed.
The actual torque required to crush the sleeve is probably in the hundreds of foot pounds. I had to use a breaker bar, a pipe, and stand on it to crush that sleeve.1989 GMC Suburban SLE 2500 4WD 5.7L Granny 4-speed
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10-19-2009, 10:37 AM #6
The torque setting is for checking the preload on the bearing. If you would like to get a new crush sleeve and crush it then we're talking over 100 ft lbs of torque.
Do you want to do this the easy way? If so forget about torque settings and do it the way I described in an earlier post.
If you want to use a torque wrench then buy a crush sleeve and pull the axles and carrier out. Then measure the existing torque it takes to turn the pinion shaft with an inch lbs torque wrench. This is the turning torque you want after changing the seal and reusing old pinion bearings. Any tighter than this will wipe out the old bearings real fast.
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