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Car Forum / Ford / Ford Trucks / October 2008Leaking rearend seal F150
Hi Folks, I am not a Ford person. Have a friend that has a 2002 F 150 6 cylinder manual shift that devolped a seal leak at 44,000 miles. Truck it not abused,does not haul heavy loads,does not tow a trailor and is driven by a 50 yaer old gent. He took it to a local shop ( non-dealer ) The guy said the " nut was loose ". ?? Replaced the seal but it still leaks. He said there is no noise, grinding or viabration. I told him I was pretty sure this was not a common symtom for a seal to fail at 44 K miles. I asked what nut? the pinion nut. He did not know. I worked on a few older vechiles and unless things really changed. I said that nut must be torqued and preloaded for the bearings. He did not know about any of that. I mentioned that he should take it to a dealer ship. Has anyone experienced this problem or was there a Recall or a Factory service bulletin about this problem ? Any inputs would be appreciated. Thanks John John, > I told him I was pretty sure this was not a common symtom for a seal to fail > at 44 K miles. [quoted text clipped - 8 lines] > > Any inputs would be appreciated. I know almost _nothing_ relevant to this. However, your mention of torque and preload sounds very reminiscent of topics that crop up in assembling a lathe spindle. I do not pretend to know more than "it's a big deal." If it will be of any help to you, I can direct you to some really clever minds in that area. You said anything :) Good luck! Bill > Hi Folks, > [quoted text clipped - 22 lines] > Thanks > John Seals leak. It would be nice if they'd wait until the vehicle has 200K miles on it, but the fact is, they can leak much earlier in their life. If the pinion nut came loose, and was caught early enough, it's possible that no damage occurred to the pinion gear and ring gear. As for the repeat failure, it is possible that the garter spring inside the new pinion seal was knocked off when the seal was driven into place. The usual old timer trick is to pack the backside of the seal with grease to keep the garter spring in place while the seal is driven home. It's possible that a sub-standard part was used. It's possible that there was a nick or some other defect in the pinion flange that went unnoticed. It's possible that the leak isn't from the seal itself but from the inner splines of the pinion flange. (they need a bit of sealant) |
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