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Unread 07-21-2014, 07:16 PM   #1
derbartman
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Wj rear drive shaft seal - again?

Hey guys / gals. I somewhat recently replaced the rear seal of the transfer case. It had been leaking and I bought a replacement from advanced auto I think and did the job. Problem is its already leaking again (maybe 3-5 months?) So I'm wondering is this just because I bought a cheap seal and I should get a better or OEM one this time, or has the shaft possibly worn down some and I should replace at least that short part of the drive shaft?

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Unread 07-21-2014, 07:56 PM   #2
ReclusiveXen
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Quote:
Originally Posted by derbartman View Post
Hey guys / gals. I somewhat recently replaced the rear seal of the transfer case. It had been leaking and I bought a replacement from advanced auto I think and did the job. Problem is its already leaking again (maybe 3-5 months?) So I'm wondering is this just because I bought a cheap seal and I should get a better or OEM one this time, or has the shaft possibly worn down some and I should replace at least that short part of the drive shaft?
Lol, could be the cheap seal. Does it leak in the same place where the last seal was leaking (if you know)? Could always be pressure buildup from a problem inside the case blowing the seal.

I have replaced some seals before for my diff but not my transfer case.
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Unread 07-21-2014, 10:58 PM   #3
derbartman
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Wj

;p

well - yes I think its leaking in the same place - as in slowly out the lip of the seal around the shaft...
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Unread 07-22-2014, 08:14 AM   #4
Jeeples
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Pull the shaft and inspect the yoke that slips into the t-case. Chances are there is a groove worn around it allowing the fluid to seep out. You can either replace the yoke or take some fine emery cloth and clean up the yoke, follow by a thorough cleaning and a little metal polish to smooth the surface.
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Unread 08-08-2014, 07:37 AM   #5
derbartman
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Ok - so I checked out the yoke, and it did/does have a grove. I bought some emery cloth and attempted to smooth it out. I got it improved for sure (groove wise) but it ended up still leaking. I am headed toward just replacing that yoke, but then I got stuck trying to figure out where/which part that is.
The FM calls it a slip yoke. When I go to this site :
http://www.driveshaftparts.com/compo...ep-components/
No yokes show up.
If I head to its yoke section : http://www.driveshaftparts.com/components/slip-yokes/
Then I see things which look similar, but since if I attempt to search by vehicle no jeep shows up - I fear they don't carry it.
I guess I need to call the dealer, but it sure seems like I should be able to get this part from other sources too?

It looks like the slip yoke for the 1310 is very similar, but I don't know what a 1310 is..

http://www.driveshaftparts.com/compo...y-series/1310/
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Unread 08-09-2014, 12:04 PM   #6
derbartman
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Checked at dealer - it took them a while to decide which one was the right one, but their price is $195!
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Unread 08-09-2014, 01:37 PM   #7
ReclusiveXen
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Originally Posted by derbartman View Post
Checked at dealer - it took them a while to decide which one was the right one, but their price is $195!
Have you checked places like quadratec to see if they have that part? I would never but from a dealer because they like to overprice things sometimes.

Could also grab one from a U-PULL-IT yard if your near one.
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Unread 08-09-2014, 02:53 PM   #8
wxmanWJ
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Have you tried the TSB for seepage from the transfer case? I see you have a 2000. Assuming you also have a NV-247 transfer case, then this might be the cause of the seepage you're seeing:

http://www.wjjeeps.com/tsb/tsb_wj_2101101.pdf
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Unread 08-09-2014, 08:26 PM   #9
derbartman
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I thought about u-pull it - it might be worth a try, but I figured there is a good chance most all the jeeps there will have the same groove issue I have. I was just holding one I found there last trip and it was rusted and had a groove - although possibly less grooved than mine.

That TSB is real interesting - Ill take a look and see if I have that type and if it had already been done.

Ill check that company too.
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Unread 08-10-2014, 09:28 AM   #10
derbartman
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ok - maybe having better luck - looks like quadratec has one for the NP242 ( http://www.quadratec.com/products/52239_0004.htm) and jeep4x4center has one for NP 231 (http://www.jeep4x4center.com/slip-yo...t-4882714.html)

So maybe I next need to make sure I know which transfer case I have.. and the TSB was for NV247 ... so many options..
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Unread 08-11-2014, 02:30 PM   #11
derbartman
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Mine has stamped on it 247 but it says " new process gear " 247 J
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Unread 08-12-2014, 08:47 AM   #12
wxmanWJ
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You have the 247 case then. One other check would be to look at your 4WD shifter bezel- if there is a "2WD" option, then you don't have the 247. If there is just "4 All Time, N, and 4 Lo", then you have the 247. But since you already checked the tag, you know you have the 247.

I performed 1/2 of that TSB I shared. I replaced just the rubber plug, and not the vent tube jiggle cap because I couldn't figure out how to access the end of the vent tube from the transfer case (it's tucked up on top of the transmission). The rear of my 247 case still seeps a bit, so I'm not sure whether the seal is bad or whether the jiggle cap would actually help. BUT...since you said you already replaced your seal maybe the TSB would help your situation.
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