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boxoftricks



Member Since: 06 Feb 2019
Location: Home Counties
Posts: 747
United Kingdom 2011 Defender 110 Puma 2.4 USW Zermatt Silver
Oil Leak
I've developed an oil leak from the circled red area by the transfer box on my 2010 TDCI 110.


Click image to enlarge

I cleaned off all the old oil using brake cleaner and took it for a quick spin.

Not sure if it is leaking down from where the transfer extension case meets the transfer box as I always thought the transfer box was dry???? Or is it leaking from the inspection cover and being blown upwards?

Any ideas and suggested fixes?
Post #772453 10th May 2019 12:55pm
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Retroanaconda



Member Since: 04 Jan 2012
Location: Scotland
Posts: 2645
Scotland 
Probably transfer box intermediate shaft seal. A poor design sees the shaft wearing the housing oval and then the o ring no longer seals.

Fix is a steel sleeve fitted to the box housing and requires stripping the box to do it. Or just live with it, as it’s usually a pretty slow leak.
Post #772458 10th May 2019 1:09pm
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boxoftricks



Member Since: 06 Feb 2019
Location: Home Counties
Posts: 747
United Kingdom 2011 Defender 110 Puma 2.4 USW Zermatt Silver
Thanks, it is leaking a few drops after each run is my guess. Is the steel shaft a specialist machine shop job or can a standard garage fix?
Post #772459 10th May 2019 1:18pm
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MK



Member Since: 28 Aug 2008
Location: Santiago
Posts: 2415
Chile 2007 Defender 110 Puma 2.4 SW Chawton White
Another less bad scenario is that the oil is coming through the female thread of such bolt. I would give it a try with a bit of teflon. Puma 110" SW

.............................................................
Earth first. Other planets later
Post #772467 10th May 2019 1:53pm
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blackwolf



Member Since: 03 Nov 2009
Location: South West England
Posts: 17376
United Kingdom 2007 Defender 110 Puma 2.4 DCPU Stornoway Grey
boxoftricks wrote:
Thanks, it is leaking a few drops after each run is my guess. Is the steel shaft a specialist machine shop job or can a standard garage fix?


Machine shop job, or Ashcroft Transmissions.
Post #772533 10th May 2019 7:12pm
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