| Transfer case leak (2009 4.2SC with Magner Steyr DD295 box) | |
The new 4.2SC Rangie has an oil leak on the transfer case, spotted on pre-purchase inspection and some money set aside (£450) to fix, knocked off the asking price. Here's a couple of pictures of the transfer case:
I have no idea why the second photo is upside down, it did that when uploaded to the gallery and the crop & rotate picture tool there doesn't seem to work.
Looking at the leak last week it appears to be leaking from the transfer case face seal, between the two casing halves, as the input and output shaft seals are dry - but I'll have a closer look to confirm. I found RRPhil's DD295 teardown thread very informative:
https://www.fullfatrr.com/forum/topic12404.html?highlight=dd295
and from further reading on this forum, it seems that curing a leaking face seal it somewhat hit and miss, and sometimes leaks from other apertures on the casings can present as a face seal leak, requiring more than one go at curing the leak until the root cause was identified.
The reason for posting this was to ask what the consensus was on replacing the three input/output shaft seals at the same time the case leak is fixed (assuming that is the problem)? Since the transfer box has to be removed anyway, and the case halves split open, I think I may ask my Indy (Keith Gott, Alton, Hants) to do the shaft seals at the same time. But on the other hand, if the shaft seals are currently good, why risk disturbing them and introducing the possibility for a shaft leak? Thoughts welcome.
The shaft seals I'm talking about are items 14, 71 and 73 on the diagram below:
Cheers, fanders 
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23rd Sep 2019 10:49am
