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ChrisDefender

Member Since: 29 Oct 2015
Location: Midlands
Posts: 456

Leaking Rear Diff

Hi,

I have a rather wet rear diff on a 2011 90.

Can you anyone tell me if I need to change all the parts circled in red on the illustration below, or is there likely to be one main culprit

Could do with having all the required parts to hand before starting the job as I need it done in one hit!

Many thanks in advance.

Click image to enlarge

15th Jul 2022 4:17pm

spudfan

Member Since: 10 Sep 2007
Location: Co Donegal
Posts: 4722

The leak will be from the 5,10,11,12 bits. Just replace the lot. 1982 88" 2.25 diesel
1992 110 200tdi csw -Zikali
2008 110 2.4 tdci csw-Zulu
2011 110 2.4 tdci csw-Masai

15th Jul 2022 4:55pm

ChrisDefender

Member Since: 29 Oct 2015
Location: Midlands
Posts: 456

Adds up to quite a bill for genuine parts! Just over £200.

15th Jul 2022 5:02pm

markb110

Member Since: 22 May 2010
Location: Guildford
Posts: 2645

Don’t forget to check that the breather tube isn’t blocked or been crushed asomewhere along it’s length…

15th Jul 2022 5:06pm

ChrisDefender

Member Since: 29 Oct 2015
Location: Midlands
Posts: 456

Thank you.

15th Jul 2022 5:10pm

spudfan

Member Since: 10 Sep 2007
Location: Co Donegal
Posts: 4722

There are decent non genuine parts out there. This might not be your particular model but just an example of the cost

https://www.advancedfactors.co.uk/rear-2-p...0927-c.asp 1982 88" 2.25 diesel
1992 110 200tdi csw -Zikali
2008 110 2.4 tdci csw-Zulu
2011 110 2.4 tdci csw-Masai

15th Jul 2022 5:11pm

Dinnu

Member Since: 24 Dec 2019
Location: Lija
Posts: 3431

2012 Defender 90 Puma 2.2 CSW Santorini Black

If the seal area of the drive flange (13) is not pitted or severely gloved, then just change the oil seal (12). Why replace otherwise good parts? 1988 90 Hard Top, 19J Diesel Turbo, Shire Blue - Restoration ongoing
2012 90 CSW, 2.2TDCI, Santorini Black

15th Jul 2022 5:45pm

blackwolf

Member Since: 03 Nov 2009
Location: South West England
Posts: 17477

2007 Defender 110 Puma 2.4 DCPU Stornoway Grey

^^^ This. 12 and possibly 13 is all you need. You can't replace the bearing without stripping the diff (you can't remove the outer race with the pinion in place).

15th Jul 2022 6:38pm

custom90

Member Since: 21 Jan 2010
Location: South West, England.
Posts: 20487

Check the prop shaft UJ’s too, as one of these had failed on mine and caused a rear diff oil leak. Had it repaired and the leak came back and only after that did it get noticed it was a prop shaft UJ and no one noticed it but me deliberately checking for it and you could barely tell unless the prop shaft is off. No Guts, No Glory.
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15th Jul 2022 9:19pm

ChrisDefender

Member Since: 29 Oct 2015
Location: Midlands
Posts: 456

Thanks for all the replies chaps, very helpful

18th Jul 2022 7:46am

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