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boxoftricks

Member Since: 06 Feb 2019
Location: Home Counties
Posts: 747

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?

10th May 2019 12:55pm

Retroanaconda

Member Since: 04 Jan 2012
Location: Scotland
Posts: 2641

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.

10th May 2019 1:09pm

boxoftricks

Member Since: 06 Feb 2019
Location: Home Counties
Posts: 747

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?

10th May 2019 1:18pm

MK

Member Since: 28 Aug 2008
Location: Santiago
Posts: 2414

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

10th May 2019 1:53pm

blackwolf

Member Since: 03 Nov 2009
Location: South West England
Posts: 17367

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.

10th May 2019 7:12pm

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