Rear output shaft seal leak

[aleebee156]

Hey guys,

See photos attached. I want to confirm what you all think this leak is from. Output shaft seal? Should I be looking to replace just the seal, or the seal and the slip yoke? Never broken into t-case and driveshaft work much so wanna confirm before i buy parts/start taking things apart. Also attaching links to parts.

Slip Yoke (either from summit or rock auto, same part)
https://www.summitracing.com/parts/rnb-697-502/overview/
http://www.rockauto.com/en/moreinfo.php?pk=1268745&cc=1051175&jsn=506

Seal
http://www.rockauto.com/en/moreinfo.php?pk=429347&cc=1051175&jsn=503

Im unsure if the Slip Yoke in each of the links above comes with the seal or not, a little confusing. emailed rock auto and they were of no help.

Let me know your thoughts, thanks.

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[dylan5299]

Cant see your photos. Says I don't have permissions. I don't know if it's any consolation, but when I bought my truck the transfer case and driveshaft had been out of it for a year at least. Slip yoke was all rusted up and seal was crap among other things. All I did was clean up the yoke by sanding it down and in between the splines making sure none were broken. Then I put in a new seal and it hasn't leaked yet. I'd buy a 15 dollar seal over and 80+ dollar yoke at least to try it any day

 

[aleebee156]

Cant see your photos. Says I don't have permissions. I don't know if it's any consolation, but when I bought my truck the transfer case and driveshaft had been out of it for a year at least. Slip yoke was all rusted up and seal was crap among other things. All I did was clean up the yoke by sanding it down and in between the splines making sure none were broken. Then I put in a new seal and it hasn't leaked yet. I'd buy a 15 dollar seal over and 80+ dollar yoke at least to try it any day

First, are you able to see the photos now? I'm curious.

Second, thanks for your input, yea good call ill just replace the seal and see how it goes. Like I said, haven't done this before but in my head Im pulling the u-joint, dropping the drive shaft, sliding out the slip yoke, pulling out the old seal, replacing with new seal, and replacing everything in reverse. Sound good? Anything I need to know about reinstalling that slip yoke?

Do you know if that seal is one that commonly fails? just curious.

 

[Vodka0tter]

There is also an O ring seal inside the tailhousing that can wear out and cause a leak. If you're going to replace the seal you may want to do both at the same time. It may cause a leak that exits through the vent hole in the driveshaft yoke.

 

[aleebee156]

Thanks I'll look more into it. Ill need to pull up a schematic of the transfer case to understand where that is and how to replace

 

[deadbeat]

Your output seal is dry, it is not leaking there. It really looks like the slip yoke is leaking, there is a little cap inside it where I guess it could leak, I cut a u joint out with a torch and put a hole in that little cap, it is very thin and may be there to keep it from hydraulic pressure applying.

Note - just noticed this was a 2 month old thread, not sure how I got on it.