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Need to know how to set the pinion nut. - Cars & Trucks

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  • Cars & Trucks Master
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The purpose of the collapsible spacer is to get the correct pinion bearing pre load. First step is to know the required pinion preload setting for your diff. Assuming that you have the correct mesh for the gears then insert the pinion seal. Assemble the pinion flange and do up the nut while moving back and forth the pinion flange to allow the bearing rollers to seat properly. using a suitable torque measuring procedure adjust the pinion nut until that torque setting is reached. ( suitable is the correct tool or attach a round disc of known dia to the flange and by calculation of radius times force ---from say a spring balance with a string wrapped around the disc--) That is to say 12 lb pull on a 4" radius disc will ==48ft/lb torque. All diffs using a collapsible space are assembled typically..; My reference is ford

Posted on Apr 21, 2013

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Posted on Jan 02, 2017

tripletauto
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SOURCE: tork specks for the pinion nut on a 10 1/4 rear end from a 97 f250 hd

dd3e543.gif
the pinion nut does not have a specific torque there is a crush sleeve in there and preload needs to be set

Posted on Sep 24, 2008

  • 22 Answers

SOURCE: pinion nut torque spec chev

Axle Preload and Backlash Specifications 8.0 Axle Preload and Backlash Specifications Application
Specification
Metric
English
Backlash
0.08-0.25 mm
0.003-0.010 in
Backlash (Preferred)
0.13-0.18 mm
0.005-0.007 in
Pinion Bearing Preload, New Bearings
1.7-3.4 N·m
15-30 lb in
Pinion Bearing Preload, Used Bearings
1.1-2.3 N·m
10-20 lb in
Pinion and Differential Case Bearing Preload, New Bearings
3.4-6.2 N·m
30-55 lb in
Pinion and Differential Case Bearing Preload, Used Bearings
2.8-5.1 N·m
25-45 lb in

Posted on May 20, 2009

  • 7353 Answers

SOURCE: Pinion nut, front differiential Torque

What it might be is what it is, you will need to measure it and write it down, then when you reassemble it, put it back to where it was. The easy way is to mark the nut and the end of the shaft (center punch) and put the nut where it was. Should be 15-30 inch pounds.

Posted on Dec 24, 2009

roniecon
  • 6826 Answers

SOURCE: Replaced rear axle pinion bearing and seal, need

There is no torque specs,this nut has to be tightened back like it was ,the best thing to do,was,to late now,is to use a torque wrench to remove the nut,and remember the torque,and when replacing it,torque it back to that spec,the reason being,there is a crush sleeve between the front pion bearing ,and the rear pinion bearing,and it has to be crushed to a certain amount,to aquire deepness into the ring gear,anyway just give it about 25 lbs torque,any more the crush sleeve will crush even more and the deepness of the pinion will be too much.

Posted on Apr 19, 2010

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Tork specks for the pinion nut on a 10 1/4 rear end from a 97 f250 hd


dd3e543.gif
the pinion nut does not have a specific torque there is a crush sleeve in there and preload needs to be set

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