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blackwolf



Member Since: 03 Nov 2009
Location: South West England
Posts: 16876

United Kingdom 2007 Defender 110 Puma 2.4 DCPU Stornoway Grey
LT230 Differential question
All the LT230 differentials that I have ever seen have looked like the photo below, and have 4 differential gears.



Recently however I have come across a new take-out centre diff unit that looks like this:



Clearly quite different, two diff gears only, and looking a bit "value engineered". Has anyone seen one like this before? Is it a later version/earlier version? Anyone know anything about it?

Thanks.
Post #774900 25th May 2019 6:12pm
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MK



Member Since: 28 Aug 2008
Location: Santiago
Posts: 2261

Chile 2007 Defender 110 Puma 2.4 SW Chawton White
Thats news to me. Maybe cheaper to build.

Std design were prone to break the pins. At least have seen a couple. Puma 110" SW

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Earth first. Other planets later
Post #774945 25th May 2019 9:39pm
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ibexman



Member Since: 13 Dec 2008
Location: kent
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Is that a 2 pin unit
Post #774947 25th May 2019 9:46pm
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blackwolf



Member Since: 03 Nov 2009
Location: South West England
Posts: 16876

United Kingdom 2007 Defender 110 Puma 2.4 DCPU Stornoway Grey
Yes, it's a two gear (single cross pin) centre diff. It has me puzzled because I'd never seen one before.
Post #774955 25th May 2019 10:32pm
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ibexman



Member Since: 13 Dec 2008
Location: kent
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Not very strong then
Post #774970 25th May 2019 11:25pm
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blackwolf



Member Since: 03 Nov 2009
Location: South West England
Posts: 16876

United Kingdom 2007 Defender 110 Puma 2.4 DCPU Stornoway Grey
Apparently this type was used on the final production vehicles, which raises some interesting questions. Did JLR run out of normal diffs and get these made on the cheap, or were these a redesign to beef up the diff (with bigger gears) for the 70th V8 specials? The mystery deepens.
Post #775357 28th May 2019 9:51pm
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MK



Member Since: 28 Aug 2008
Location: Santiago
Posts: 2261

Chile 2007 Defender 110 Puma 2.4 SW Chawton White
I imagine machining the 2 piece "usual" diff costs more than casting one piece. And I also imagine the new Defender does not come with the LT230 Question Puma 110" SW

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Earth first. Other planets later
Post #775365 28th May 2019 10:01pm
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Caterham



Member Since: 06 Nov 2008
Location: Birmingham
Posts: 6264

England 2011 Defender 110 Puma 2.4 XS CSW Stornoway Grey
I think the 70th editions come with the Ashcroft atb diff.
Post #775367 28th May 2019 10:05pm
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excossack



Member Since: 22 Feb 2012
Location: North West
Posts: 5740

United Kingdom 1999 Defender 110 Td5 SW Caledonian Blue
I think the top one is an Ashcroft centre ATB 1999 Defender TD5 110

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John M0VAZ
Econet Station 48 no clock
Post #775397 29th May 2019 9:10am
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blackwolf



Member Since: 03 Nov 2009
Location: South West England
Posts: 16876

United Kingdom 2007 Defender 110 Puma 2.4 DCPU Stornoway Grey
No, the top one is a standard diff out of any standard LT230 transfer box (any except for ones with a diff like the lower one anyway).
Post #775443 29th May 2019 5:40pm
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Naks



Member Since: 27 Jan 2009
Location: Stellenbosch, ZA
Posts: 2588

South Africa 2010 Defender 90 Puma 2.4 SW Alpine White
I agree with excossak, that top one is definitely not an LR one but an Ashcroft one --
2010 Defender Puma 90 + BAS remap + Alive IC + Slickshift + Ashcroft ATB rear
2015 Range Rover Sport V8 Supercharged



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Post #775464 29th May 2019 9:05pm
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rallysteve



Member Since: 10 Feb 2014
Location: Cumbria
Posts: 2199

United Kingdom 2002 Defender 110 Td5 DCPU Keswick Green
I assure you that the top one is a normal open differential for the LT230 as fitted to pretty much every LT230 (with the exception Blackwolf has noted) as stated by the OP.

From the LT230 manual:


Click image to enlarge
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Post #775471 29th May 2019 9:30pm
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diesel_jim



Member Since: 13 Oct 2008
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United Kingdom 2006 Defender 110 Td5 SW Epsom Green
^^ agree
Post #775474 29th May 2019 9:43pm
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blackwolf



Member Since: 03 Nov 2009
Location: South West England
Posts: 16876

United Kingdom 2007 Defender 110 Puma 2.4 DCPU Stornoway Grey
There is no doubt whatsoever about the top one, the top one isn't in question. It's the second one that's the mystery.
Post #775482 29th May 2019 10:06pm
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ashtrans
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Member Since: 08 Nov 2008
Location: Harpenden
Posts: 254

United Kingdom 
Hi,

the top one is stock used on most LT230's

the lower one is the very late TDCi stock open diff, open 2 pin design

used for approx last 2 years of production, major step backwards, making the weak link even weaker !!

I guess just a cost saving exercise, certainly not an improvement, Dave
Post #775524 30th May 2019 10:33am
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