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Discussion Starter #1
I’ve got conflicting numbers on this. 12 bolt car rear end making noise. Shop owner says 25 in lbs for new bearings and 12-15 for used. Yukon says 25 in lbs is 30% over what it should be and the bearing will fail before long. I Found a chart that shows 14-19 new and 6-8 used at differential.com. So which is right?
 

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I’ve always done 25 in/lbs on new bearings. Used bearings i just snug the pinion nut up against the crush sleeve.
 

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Discussion Starter #5
Well the tech guy at Yukon gear is telling me 14-19 with new bearings. while shop is standing by 25. Just trying to figure out if I have a bearing or if it’s the gears being noise. I’ve just never heard gears that were loud from 35-60, 35-75, 20-60 mph. Just kinda moves around depending on how long you drive it.
 

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I like it between 17-19 for new bearings. 14-19 is standard for a M802048/M88649 bearing combo (12 bolt car, 8.8 ford, 8.5 chevy) running new bearings. 25 is too tight IMO

Miles
 
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