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Bristol 90XS



Member Since: 31 Oct 2010
Location: North of Bath
Posts: 223

England 
Puma Diffs
Quick question having just done a search and getting differing answers..

Does anyone know definitively if the front diff on a Puma is a 4 pin diff or is it a 2 pin diff? Is there any way to check aside from taking it apart?

Its a 2014 110 SW.

Need to know as might need to upgrade it with the forthcoming power upgrade Very Happy

James
Post #617559 17th Apr 2017 9:17pm
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custom90



Member Since: 21 Jan 2010
Location: South West, England.
Posts: 20454

United Kingdom 
I can't give a definitive guaranteed answer.
But I'm pretty sure it's the rear that is 2 pin only. No Guts, No Glory.
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Post #617570 17th Apr 2017 9:49pm
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blackwolf



Member Since: 03 Nov 2009
Location: South West England
Posts: 17453

United Kingdom 2007 Defender 110 Puma 2.4 DCPU Stornoway Grey
Front is two gear on 90s, and most 110s and 130s it seems. In theory post c.2010 all LWB fronts should be four gear but many are still two.

Reats on 90s are two gear Rover pattern, on 110 and 130 four gear P38.

Front diff can be identified as 2 or 4 by looking through filler hole.
Post #617572 17th Apr 2017 10:00pm
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Bristol 90XS



Member Since: 31 Oct 2010
Location: North of Bath
Posts: 223

England 
Thanks blackwolf- that most likely explains the issue.

Amongst other conflicting guidance Ashcroft are saying it's 2 pin front and I should upgrade but my local LR me hanic who has worked land rovers all his life is saying 4 pin. He changed the oil at last service too so maybe he's had a look in. I'll ask him to check at next service.

James
Post #617580 17th Apr 2017 10:27pm
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jst



Member Since: 14 Jan 2008
Location: Taunton
Posts: 8068

 2011 Defender 110 Puma 2.4 USW Stornoway Grey
As black wolf says above.

10my onwards 110 fronts were all meant to be 4 pin. Although on stripping my oct 10 110 had a two pin!

Likewise the 110s at work, 13 14 plate were also a mix front. Cheers

James
110 2012 XS Utility
130 2011 M57 bespoke Camper
90 2010 Hardtop
90 M57 1988 Hardtop
Post #617592 18th Apr 2017 6:16am
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LR90XS2011



Member Since: 05 Apr 2011
Location: bickenhill
Posts: 3645

United Kingdom 2011 Defender 90 Puma 2.4 XS CSW Galway Green
it should be recorded on your build sheet ask LRCR or the selling dealer for a copy. DEFENDER 90 TDCI XS,

I hope everyone is well and your land rovers make you happy
Post #617594 18th Apr 2017 6:21am
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blackwolf



Member Since: 03 Nov 2009
Location: South West England
Posts: 17453

United Kingdom 2007 Defender 110 Puma 2.4 DCPU Stornoway Grey
You'll know it't a two gear diff when it disintegrates, but that is usually a bit late!

Fit an Ashcroft ATB and put an end to your worries. When I did mine it was also cheaper than a reconditioned four gear diff from LR.
Post #617602 18th Apr 2017 7:19am
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bpman



Member Since: 21 May 2008
Location: Oslo
Posts: 8069

2008 Defender 110 Puma 2.4 SVX Station Wagon Santorini Black
^^ I did the same on my 2010 110 defender, front 2 pin, rear 4 pin, now running front and rear Ashcroft LSD's Thumbs Up
Post #617607 18th Apr 2017 7:46am
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Bristol 90XS



Member Since: 31 Oct 2010
Location: North of Bath
Posts: 223

England 
Have been looking at the Ashcroft LSD. Ashcroft saying they are t any stronger than the 4-pin std diff assuming my I have one.

But how do they drive? Am going to be putting about 430bhp and twice the torque through them shortly so am thinking an lsd might help with traction but have heard it makes the car less nice to drive and grabby? Interested in your take on tem BO Man.

Thanks
James
Post #617627 18th Apr 2017 9:42am
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jst



Member Since: 14 Jan 2008
Location: Taunton
Posts: 8068

 2011 Defender 110 Puma 2.4 USW Stornoway Grey
i would fit an ashcrfot locker then for that Nm/bhp irresepctive of whether you plumb it in. might want to peg diffs too and assume CV shafts already on the list? Cheers

James
110 2012 XS Utility
130 2011 M57 bespoke Camper
90 2010 Hardtop
90 M57 1988 Hardtop
Post #617657 18th Apr 2017 11:33am
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JOW240725



Member Since: 04 May 2015
Location: Suffolk
Posts: 7907

United Kingdom 2012 Defender 110 Puma 2.2 XS CSW Orkney Grey
James, not sure if you've seen this thread on the LSD, but seems to cover most views http://www.defender2.net/forum/topic13545.html?highlight=lsd

John Fair also has some interesting comments on diffs here http://www.defender2.net/forum/topic46611-60.html James
MY2012 110 2.2TDCi XS SW Orkney Grey - http://www.defender2.net/forum/topic43410.html
MY1990 110 200TDi SW beautifully faded Portofino Red - https://www.defender2.net/forum/post743641.html#743641
MY1984 90 V8 Slate Grey - https://www.defender2.net/forum/post744557.html#744557
Instagram @suffolk_rovers
Post #617659 18th Apr 2017 11:41am
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bpman



Member Since: 21 May 2008
Location: Oslo
Posts: 8069

2008 Defender 110 Puma 2.4 SVX Station Wagon Santorini Black
Bristol 90XS (James) I agree with JST using lockers rather than LSDs for that much BHP, however for the record, the Ashcroft LSDs make virtually no difference to the defender "driving experience", I use mine on and off road, and on wet grassy slopes you can feel the LSDs working.
Post #617664 18th Apr 2017 11:58am
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JOW240725



Member Since: 04 May 2015
Location: Suffolk
Posts: 7907

United Kingdom 2012 Defender 110 Puma 2.2 XS CSW Orkney Grey
Would I be right in thinking you'd only ever want full lockers off-road? Therefore if (and apologies James if I'm making the incorrect assumption) this is a road biased V8 Defender then LSD would surely be the better option? James
MY2012 110 2.2TDCi XS SW Orkney Grey - http://www.defender2.net/forum/topic43410.html
MY1990 110 200TDi SW beautifully faded Portofino Red - https://www.defender2.net/forum/post743641.html#743641
MY1984 90 V8 Slate Grey - https://www.defender2.net/forum/post744557.html#744557
Instagram @suffolk_rovers
Post #617672 18th Apr 2017 12:14pm
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jst



Member Since: 14 Jan 2008
Location: Taunton
Posts: 8068

 2011 Defender 110 Puma 2.4 USW Stornoway Grey
for strength i believe the locker is better for longevity. but yes only really off road usage. although rear could be used to put power down. you just need to control it.

i have air lockers in mine front and rear. the rear being the hypoid diff from Dave A crown wheel/pinion is much better than stock before you even look at the centres. Cheers

James
110 2012 XS Utility
130 2011 M57 bespoke Camper
90 2010 Hardtop
90 M57 1988 Hardtop
Post #617673 18th Apr 2017 12:17pm
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Caterham



Member Since: 06 Nov 2008
Location: Birmingham
Posts: 6301

England 2011 Defender 110 Puma 2.4 XS CSW Stornoway Grey
Bristol 90XS wrote:
Have been looking at the Ashcroft LSD. Ashcroft saying they are t any stronger than the 4-pin std diff assuming my I have one.

But how do they drive? Am going to be putting about 430bhp and twice the torque through them shortly so am thinking an lsd might help with traction but have heard it makes the car less nice to drive and grabby? Interested in your take on tem BO Man.

Thanks
James


I'm guessing that'll be more than a stage 1 or 2 remap then Very Happy
Post #617734 18th Apr 2017 5:07pm
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