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Old 06-18-2012, 12:28 PM   #1
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Question about gear whine...

I am running Yukon 4.88s and when the fluid is below 50 degrees the front gears have a little whine to them. When the fluid is warm, there is zero whine, runs smooth, no problems. It ONLY whines a little when it's cold.

Right now being the middle of summer it never makes noise because its always above 50 degrees day and night. But this Fall when the mornings get cool again the front diff will whine until the fluid warms up then its fine. I run 75w90.

Is this something I need to fix ASAP? Why is it only whining when its cold?

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Old 06-18-2012, 12:37 PM   #2
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chances are the crush sleeve has been crushed and they over tightened the pinion nut.

take it back to the shop who installed it and tell them you hear these noises.

they should inspect the bearings before they blow and destroy the whole diff incl, R&P and lockers...

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Old 06-19-2012, 07:34 AM   #3
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I think I'm going to pop the inspection cover off and take a look at the gearset.. see what it looks like.
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