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Old November 6th, 2011, 01:58 PM   #1
HVYRTFT
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Default Pinion seal question

2004 F-150 4x4
Sterling 9.75

I am going to replace the pinion seal in the rear axle. Does the pinion nut have a torque spec to maintain proper bearing pre-load?
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Old November 7th, 2011, 09:33 AM   #2
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Quote:
Originally Posted by HVYRTFT View Post
2004 F-150 4x4
Sterling 9.75

I am going to replace the pinion seal in the rear axle. Does the pinion nut have a torque spec to maintain proper bearing pre-load?
You're going to want to do a pinion torque to rotate measurement before you remove the pinion nut, and match that when you re-assemble. The axle is set up new to a specified torque to rotate value, but after the bearings run for a few thousand miles, the TTR will drop. Many a bearing set has been destroyed after the nut is torqued to achieve a "new" range TTR on a used set of pinion bearings.
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Old November 7th, 2011, 11:40 AM   #3
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I have good luck marking the pinion nut and the pinion with a center punch. Chech the rotational force before and after using your marks as a guide .
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