replacing the outer wheel bearings
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Senior User
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Two new tire and still makes the same noise from the rear end. Checked the oil again and it was a little low. I added some oil and took the truck for a drive. It seemed to help but it is still making the whine just not as loud. The plug had a thick black grease on it. It didnt feel like there was any metal in the black grease on the plug. So what do you guys think? Start with the outer wheel bearings? the noise does seem to be more on the passengers outside corner. Should I take the cover off and clean out the case and refill with new oil?Any input will help! Has anybody put Amsoil in the rear end? I've been told it helps quiet down the gears. Thanks!
Fleet Owner
Joined: Sep 2005
Posts: 28,609
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From: Lake Tahoe, Nevada
If you go that route, place some strong magnets inside the housing to collect any future steel or iron debris.
Did you put it on jacks, chock the front wheels, and use a stethoscope to isolate the sound?
Did you put it on jacks, chock the front wheels, and use a stethoscope to isolate the sound?
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no I have not, but that is a good idea! Thanks!
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Senior User
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how do I view the TSB's? I found them but how do I read the info that they give? Sorry to be a pain in the butt!
Not a difficult project. Other costs you need to consider.
2 quarts of 75-140 syn. gear lube (check the tsb). $50.00
Friction modifier. $18.00
Black RTV. $5.00
Consumables. $5.00
There is another tsb that discribes rear diff. whine. I will try to locate it for you and re post. It would be a good idea to narrow down the source of the whine before you start throwing your time and money at it.
Here is the tsb for the "05 model. I will continue to look for the "07.
05-23-3***REAR AXLE NOISE REPAIR
Not finding a tsb for the "07.
2 quarts of 75-140 syn. gear lube (check the tsb). $50.00
Friction modifier. $18.00
Black RTV. $5.00
Consumables. $5.00
There is another tsb that discribes rear diff. whine. I will try to locate it for you and re post. It would be a good idea to narrow down the source of the whine before you start throwing your time and money at it.
Here is the tsb for the "05 model. I will continue to look for the "07.
05-23-3***REAR AXLE NOISE REPAIR
Not finding a tsb for the "07.
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Senior User
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Okay I changed both sides on the outer bearings of the rear end. still same noise! There wasn;t any metal in the housing when I pulled the cover off. There was like a dark gray coating on the the internal parts. Any ideas would be a great help. I'm almost to the point of taking it in to the dealer. Just really dont have the extra right now o pay someone that I can do for free.
Senior User
Joined: Aug 2008
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From: Vicksburg, MS
Check on a local shop that specializes in drive lines. There are some shops in my area that do very good work for a fraction of dealer cost and they use OEM or better parts.
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Well truck went to the shop today. The pinion bearing is bad. Which I'm lucky enough to have the 9.75 axle so that means no aftermarket parts. The bearings had to come from the Ford dealer. $800 later and I will be back on the road again with a quite truck. The truck only has 66,000 miles on it! Thanks to everyone that responded to this thread and gave the time to try to help.
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