Slip Joint Regrease Urgent Question
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Tuned
Joined: Aug 2003
Posts: 341
Likes: 3
From: McMinnville
Slip Joint Regrease Urgent Question
I decided to undertake this little no cost project and ended up with a question before reassembling. I did mark both ends but how "crucial" is it that they align back up 100%, can they be off a spline? I noticed the rear one was about three splines off. Does the double spline in the front make a difference where it aligns?
I also noticed some leakage - it is in the rear diff, where the u-joints connect, does it look like an oil leak to you?
I also noticed some leakage - it is in the rear diff, where the u-joints connect, does it look like an oil leak to you?
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Tuned
Joined: Aug 2003
Posts: 341
Likes: 3
From: McMinnville
Well, I was so careful to make sure the line was drawn correctly, etc.. and I think I have it lined up, however, what would I notice if I was off? It seems weird that with the u-joint the way it is how could it get mis-aligned since the ujoints only fit one way (having it jacked up without moving wheels).
Anyway, what would I notice if I was not 100% aligned?
Anyway, what would I notice if I was not 100% aligned?
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Tuned
Joined: Aug 2003
Posts: 341
Likes: 3
From: McMinnville
Hmm, well, I think I just got lucky then because I put it all back together and went for a drive, up to 60mph and no vibration 
yahoo!
Thank you!
I think what I did wrong was marked them both at the same time so when i went to unbolt it, it slipped and blah blah blah.
yahoo!Thank you!
I think what I did wrong was marked them both at the same time so when i went to unbolt it, it slipped and blah blah blah.
Lead Driver
Joined: Jun 2013
Posts: 5,648
Likes: 893
From: north of Minneapolis, MN
I believe the spline has a couple of "teeth" machined in a skip pattern, only goes together one way.
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Senior User
Joined: Jun 2012
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I don't really believe it is that important to line it up perfectly. I replaced mine with a new one which means I had no way to line anything up & I have absolutely no vibrations. Biggest thing I think is just to have a good, well ballanced driveshaft. Also the leakage is most likely your rear pinion seal. If you had the pinion off anyway its the perfect time to replace it. Its a $12 dollar part & a 5 min job.
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Senior User
Joined: Jun 2012
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No that is true. Propper torque of the pinion nut is crucial. I believe 150 ft/lbs is the factory spec but don't quote me on that.
Hotshot
Joined: Jun 2007
Posts: 10,008
Likes: 7
From: Austin, TX
If you call pulling the diff cover, diff and ring gear, pinion, remove/install pinion seal, check bearings, install new crush sleeve, install pinion with proper pinion bearing pre-load, install diff/ring gear, diff cover, new fluid a 5 minute job, you're more of a wrench than I am. LOL It's not a hard job, but it's definitely not a 5 minute job to do it correctly... Especially if any of those bearings need to be replaced for any reason.
Logistics Pro
Joined: Nov 2006
Posts: 3,679
Likes: 370
From: Fallon,NV & Bainbridge OH
That leak in the picture is not the pinion seal, that is gear oil wicking down the pinion shaft. You would have to pull the yoke, clean, apply sealer and re-torque the pinion nut. If you do that you might as well replace the pinion seal but don't forget to grease the inside of the seal before installing the yoke and no you don't need to replace the crush sleeve.
Cargo Master
Joined: Apr 2007
Posts: 2,333
Likes: 1
From: St. Louis, Mo.
I decided to undertake this little no cost project and ended up with a question before reassembling. I did mark both ends but how "crucial" is it that they align back up 100%, can they be off a spline? I noticed the rear one was about three splines off. Does the double spline in the front make a difference where it aligns?
I also noticed some leakage - it is in the rear diff, where the u-joints connect, does it look like an oil leak to you?
I also noticed some leakage - it is in the rear diff, where the u-joints connect, does it look like an oil leak to you?
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