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Unread 01-14-2014, 06:32 PM   #1
bigbossd1030
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Star like seal in xcase?

I got my yoke in the mail today and after we pulled the ole one out we found this star/spiky rubber piece, I have a new one from a kit from a while ago, but this one is all mangled. Is this normal???!!!! Should I be concerned?

image-2191527576.jpg

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Unread 01-14-2014, 06:36 PM   #2
kloppk
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It should look like the one on the left.
Someone probably didn't have the one on the right properly seated before they tightened the nut.
It's purpose is to seal between the yoke and the output shaft.
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Unread 01-14-2014, 06:38 PM   #3
bigbossd1030
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Quote:
Originally Posted by kloppk
It should look like the one on the left. Someone probably didn't have the one on the right properly seated before they tightened the nut.
do you know how to seat it properly? Is it just as simple as making sure it's flat and in the splines?
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Unread 01-14-2014, 06:38 PM   #4
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Quote:
Originally Posted by bigbossd1030 View Post
do you know how to seat it properly? Is it just as simple as making sure it's flat and in the splines?
Yes - in the splines of the yoke
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Unread 01-14-2014, 06:46 PM   #5
bigbossd1030
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Quote:
Originally Posted by kloppk
Yes - in the splines of the yoke
does the seal go first? Or after? I don't want to mess this up.
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Unread 01-14-2014, 07:00 PM   #6
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Slide the yoke onto the shaft all the way.
Install the star seal onto the shaft and carefully line up the tips of the seal with the teeth in the yoke.
Carefully press the star washer into the all of the teeth in the yoke. It should be lying flat and just about flush with the surface the yoke nut presses on when it's tightened.
Install the nut and torque to spec.
As the nut tightens the last bit it compresses the star washer causing it to expand and seal.
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Unread 01-14-2014, 07:19 PM   #7
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None of those are intact once they leave the factory. Every one that I have opened up has been mangled beyond recognition. I have even used rtv in lieu of one once. Its still going strong in a friends TJ.
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Unread 01-14-2014, 08:06 PM   #8
bigbossd1030
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Thanks guys, got it done and no leak so far. Haven't tested it yet, found a crack around one of my skid plate bolts so I'm going to fix that at work tomorrow. Might think about a new plate soon. Thanks again.
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Unread 01-15-2014, 08:02 AM   #9
gunshw301
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Can I get a confirmation? I was always told that the rubber washer was placed opposite of the splines......so the peaks and valleys of the washer would not match up to the peaks and valleys of the shaft.

I have done this on a few tc rebuilds with no leaks that I have noticed. Maybe it does not matter?
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Unread 01-15-2014, 08:24 AM   #10
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It only fits snugly one way and kind of falls into place once you poke and prod.
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Unread 01-15-2014, 10:24 AM   #11
bigbossd1030
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I placed the star seal to match the splines. It seamed to slightly sit above flush. If it sat opposite of the splines.... Why would it even have the points? Why not just a circle if you are going to mash the seal up anyway? I don't know, I just put it inside the splines and ill test it out tonight after I put the skid back on to see if it leaks or not.
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Unread 01-15-2014, 10:30 AM   #12
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It should sit above flush and then when the nut is torqued, it'll smash in every little crevice and put pressure on every side that it touches which is a lot considering the points. If you end up with a leak, the star isn't seated or the outer seal is out.
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