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Old 02-11-2013, 08:31 PM   #1
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Drive shaft ?

Was under my jeep today and was noticing some oil build up around where the drive shaft goes into the front axle. To my understanding there should be no leakage. Am I correct ?

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Old 02-11-2013, 08:43 PM   #2
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It sounds like you're describing the pinion shaft leaking where it enters the housing. There is a pinion seal that is supposed to keep that part of things leak-free. Luckily, the pinion shaft seal is replaced entirely from the outside of the axle housing & can be changed in an hour with the pinions seal cost usually being <$20. Any 4x4 shop can do the repair which will likely be less costly than having a general purpose garage or axle shop do it.

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Old 02-11-2013, 10:12 PM   #3
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Quote:
Originally Posted by Jerry Bransford View Post
It sounds like you're describing the pinion shaft leaking where it enters the housing. There is a pinion seal that is supposed to keep that part of things leak-free. Luckily, the pinion shaft seal is replaced entirely from the outside of the axle housing & can be changed in an hour with the pinions seal cost usually being <$20. Any 4x4 shop can do the repair which will likely be less costly than having a general purpose garage or axle shop do it.
What if I could take it to a shop and pay $50 to get it fixed? Or could I do it my self for cheaper? I am pretty handy with a wrench just no very savvy with technical terms. I have complete rebuild manuals to assist as well.
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Old 02-12-2013, 02:51 AM   #4
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You should be able to do it fine. I believe you have to reinstall/install a new crush sleeve behind the pinion seal and thats normally where people mess up. As long as you are careful and get it on straight, you should be good. Doing it yourself requires removing the driveshaft from the axle side and removing the large bolt under that (sorry, I can't think of a good way to explain it) im sure Jerry will make it all make sense.
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Old 02-12-2013, 07:47 AM   #5
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Yes if I remember correctly there is a crush sleeve that will also need to be replaced along with the pinion nut and of course the seal that you are wanting to replace. Do not try and use the same pinion nut again or you will run into problems as they are made to deform when installed. The torque wrench needed to torque the pinion nut is one that should be adjustable from 150-300 foot pounds and is not a common tool by most garage mechanics.
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Old 02-12-2013, 08:54 AM   #6
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No need to install a new crush sleeve that would involve removing the carrier/ring gear and the pinion gear. That in and of itself is a pretty major job, thankfully it's not needed just to replace the pinion seal. Simply torque the pinion shaft nut to 165-180 ft-lbs. afterward and it should be fine. A new pinion nut is officially recommended but it's not absolutely required.
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Old 02-12-2013, 08:58 AM   #7
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Looks like got some garage time this weekend. One more question, I am still good to drive right?
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Old 02-12-2013, 09:03 AM   #8
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Yep, no problem. Unless you are losing a lot, its fine. You should probably remove the filler nut on the front of the diff and check the oil level. It should be just to the bottom of the bolt hole or so. If the level is good, dont worry about it. Mine has dripped probably 1-2 drops a day for the past year and my level hasn't appeared to change at all.
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Old 02-12-2013, 09:09 AM   #9
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Thanks to all for the help and advise .

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