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2001 F150 4.6l Diff Fluid Leaking from Inside Tire


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Merrick333
New User

Jan 5, 2010, 7:49 PM

Post #1 of 3 (2240 views)
2001 F150 4.6l Diff Fluid Leaking from Inside Tire Sign In

For the second time in a year and half my truck has developed a leak from the area inside the right tire where the axle and brakes meet. Again it smells like differential fluid and is spraying the inside tire, wheel well, and brakes. Last time I sent it to a shop and refuse to ever go back there, but according to them the problem was the rear right bearing. I dont haul anything much anymore and maintain my truck according to the manufacturers suggested schedule, so I am having some difficulty believeing that I could have the same problem twice in about a year without something else being wrong. Any help would be extremely appreciated. There are no obvious defects on the axle, except for the leak.


DanD
Veteran / Moderator
DanD profile image

Jan 6, 2010, 6:59 AM

Post #2 of 3 (2231 views)
Re: 2001 F150 4.6l Diff Fluid Leaking from Inside Tire Sign In

Not sure why a seal would fail again; other then it was defective or possibly damaged during installation.
The bearing was then and likely now is ok; but because of the design the bearing has to be removed from the axle shaft to replace the seal. Most times that doesn’t happen without dummying the bearing and having to replace it along with the seal. Also I have found that the seal to axle mating isn’t where the leak was from; but from the seal to the differential housing. I now always use a bit of silicone on the housing; just for a bit of insurance.



Dan

Canadian "EH"






nickwarner
Veteran / Moderator
nickwarner profile image

Jan 19, 2010, 6:53 PM

Post #3 of 3 (2181 views)
Re: 2001 F150 4.6l Diff Fluid Leaking from Inside Tire Sign In

please realize that the seal in question is about a $7 part and sometimes can go out. Don't be too hasty to condemn the guy that worked on it. I hate when that happens. I have installed parts exactly to spec to have them prematurely fail due to a defect in manufacturing and heard an earful from the customer when it wasn't even my fault for the problem. Please keep that in mind that you shouldn't automatically blame the tech everytime.






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