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02 Sierra Rear Dif Bearing Replacement ?

02 Sierra Rear Dif Bearing Replacement ?

Postby wtmaniac [OP] » Jan 09 2013, 2:45pm

I have a 02 Sierra 1500 and I have a howl coming from the rear dif I am pretty sure I need to replace the bearings. I have 160000 miles on it. I am looking for imput on approx time it should take and anything in particular to look for when I have it apart . Thanks
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Re: 02 Sierra Rear Dif Bearing Replacement ?

Postby ASTE25 » Jan 09 2013, 8:28pm

Depending on which bearing is bad will depend on if you can do the job yourself. If it is an axle bearing, it won't be bad. If it is a carrier or pinion bearing I would suggest taking it to someone who has set up rear ends before. There are a lot of things you need to know how to do properly, as well as some specality tools needed, to set up a rear end correctly. If you don't get it right, you will ruin the rear end in no time.
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Re: 02 Sierra Rear Dif Bearing Replacement ?

Postby wtmaniac [OP] » Jan 09 2013, 8:36pm

Thanks for the imput. I was hoping to do it myself but if special set up tools are needed I will have a qualified mechanic do it. I really don't want to go through all the work and have it fail due to my shadetree approach.
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Re: 02 Sierra Rear Dif Bearing Replacement ?

Postby ASTE25 » Jan 09 2013, 8:41pm

Well, let us know what you find out.
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Re: 02 Sierra Rear Dif Bearing Replacement ?

Postby wtmaniac [OP] » Jan 09 2013, 8:43pm

Will do thanks
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Re: 02 Sierra Rear Dif Bearing Replacement ?

Postby raider27 » Jan 09 2013, 8:47pm

How are your tires? I had some old Michelin's on my truck and they kinda howled.
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Re: 02 Sierra Rear Dif Bearing Replacement ?

Postby masterem88 » Jan 09 2013, 9:50pm

If you point it to your diff as the source of noise. If the noise changed with vehicle speed as in gets louder or faster paced with faster your going and no change when on or off the throttle then it will be carrier bearings or outer axle bearings. If it changes or goes away when you let off the throttle or goes away when on the throttle either way, itll be pinion bearing or ring and pinion gears themselves. Unless you have a good eye and know what to look for when dissassembling a differential and have the right setup tools. Example ( magnetic mount dial indiactor and pinion depth setup tool and feeler gauges) i would not try without these. Ive got em good with feel of backlash and gear paint compound and setting it up manually but its very time consuming this way and its near impossible to get it absolutely perfect . Just doing bearing change will not require these tools but these measurements to to be checked no matter what to see how much wear your gears have before and after.
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Re: 02 Sierra Rear Dif Bearing Replacement ?

Postby wtmaniac [OP] » Jan 09 2013, 9:53pm

No it's not tires . To test it I put it up on jack stands and the howl is someplace in the rear end.
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Re: 02 Sierra Rear Dif Bearing Replacement ?

Postby masterem88 » Jan 09 2013, 11:19pm

Ok just to make sure. Id ck rear ujoints to make sure one of them isnt bad, or sloppy, or dry and rusty inside caps
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Re: 02 Sierra Rear Dif Bearing Replacement ?

Postby wtmaniac [OP] » Jan 11 2013, 2:28am

Well just back from the repair shop and after replacing all the bearings in the rear dif and all the howling is history . The carrier bearing was ok and the the outer axle bearings looked good too. I am happy to have a top notch mechanic I can count on to deal with the repairs that are beyond my ability. I hope the drivetrain will be good for another 160000 well at least I can hope thanks for the comments and imput


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