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Naks



Member Since: 27 Jan 2009
Location: Stellenbosch, ZA
Posts: 2579

South Africa 2010 Defender 90 Puma 2.4 SW Alpine White
ordered an Ashcroft ATB for the rear diff. Can't wait to install and go play Thumbs Up --
2010 Defender Puma 90 + BAS remap + Alive IC + Slickshift + Ashcroft ATB rear
2015 Range Rover Sport V8 Supercharged



Defender Puma Workshop Manual: https://bit.ly/2zZ1en9
Discovery 4 Workshop Manual: https://bit.ly/2zXrtKO
Range Rover/Sport L320/L322/L494 Workshop Manual: https://bit.ly/2zc58JQ
Post #623339 11th May 2017 8:07am
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Sadi



Member Since: 23 Jul 2015
Location: Windhoek
Posts: 334

Namibia 2016 Defender 110 Puma 2.2 Heritage Edition SW Grasmere Green
KAM...
KAM seems to offer a combination LSD and diff lock in one diff - with locker selectable when necessary. But never read about it in practice yet:



Click image to enlarge
Post #623782 13th May 2017 6:00am
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LR90XS2011



Member Since: 05 Apr 2011
Location: bickenhill
Posts: 3602

United Kingdom 2011 Defender 90 Puma 2.4 XS CSW Galway Green
think that needs a lot of mods to the axle casing DEFENDER 90 TDCI XS,

I hope everyone is well and your land rovers make you happy
Post #623790 13th May 2017 6:45am
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Timo K



Member Since: 23 Aug 2012
Location: Helsinki
Posts: 169

Finland 
It's also a clutch pack type LSD instead of the gear driven variant.
Post #623818 13th May 2017 9:42am
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Arierep



Member Since: 12 Apr 2013
Location: Portugal
Posts: 258

Portugal 1995 Defender 90 300 Tdi SW Alpine White
Hi,

Been told that the ATBs don't react well to big tyres.
Anyone has feedback on how well they work with let's say 35" tyres?
Post #624000 14th May 2017 9:30am
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blackwolf



Member Since: 03 Nov 2009
Location: South West England
Posts: 16808

United Kingdom 2007 Defender 110 Puma 2.4 DCPU Stornoway Grey
They work exceedingly well with 255/85 x 16 tyres.
Post #624214 14th May 2017 9:51pm
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Arierep



Member Since: 12 Apr 2013
Location: Portugal
Posts: 258

Portugal 1995 Defender 90 300 Tdi SW Alpine White
That's the size I have right now.
I'm considering to order an ATB this week for the rear, then if I like it maybe get one for the front also.
I might go for 315/75R16 in the future, want to be sure the ATB diffs keep the job with that
Post #624215 14th May 2017 9:58pm
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Naks



Member Since: 27 Jan 2009
Location: Stellenbosch, ZA
Posts: 2579

South Africa 2010 Defender 90 Puma 2.4 SW Alpine White
Look at what arrived this weekend, can't wait until it's installed!


Click image to enlarge
 --
2010 Defender Puma 90 + BAS remap + Alive IC + Slickshift + Ashcroft ATB rear
2015 Range Rover Sport V8 Supercharged



Defender Puma Workshop Manual: https://bit.ly/2zZ1en9
Discovery 4 Workshop Manual: https://bit.ly/2zXrtKO
Range Rover/Sport L320/L322/L494 Workshop Manual: https://bit.ly/2zc58JQ
Post #630677 12th Jun 2017 7:56am
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Naks



Member Since: 27 Jan 2009
Location: Stellenbosch, ZA
Posts: 2579

South Africa 2010 Defender 90 Puma 2.4 SW Alpine White
is the P38 spacer ring necessary when installing in a Puma rear diff? Question --
2010 Defender Puma 90 + BAS remap + Alive IC + Slickshift + Ashcroft ATB rear
2015 Range Rover Sport V8 Supercharged



Defender Puma Workshop Manual: https://bit.ly/2zZ1en9
Discovery 4 Workshop Manual: https://bit.ly/2zXrtKO
Range Rover/Sport L320/L322/L494 Workshop Manual: https://bit.ly/2zc58JQ
Post #630769 12th Jun 2017 1:42pm
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MK



Member Since: 28 Aug 2008
Location: Santiago
Posts: 2255

Chile 2007 Defender 110 Puma 2.4 SW Chawton White
If yours is a 90" then you do not need the spacer. Puma 110" SW

.............................................................
Earth first. Other planets later
Post #630774 12th Jun 2017 2:15pm
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LR90XS2011



Member Since: 05 Apr 2011
Location: bickenhill
Posts: 3602

United Kingdom 2011 Defender 90 Puma 2.4 XS CSW Galway Green
well finally got round to fitting one of my Ashcroft ATBs into my rear axle.

Swapped the crown wheel over from the standard diff adjusted the bearings per the manual, all went well and completed on the drive in just over 3 hrs start to finish.

Most difficult bits were getting the back lash right (you need a DTI) and holding the diff when you torque up the crown wheel bolts and bearing carrier bolts as I only have a 1 ton vice it was only just big enough. otherwise a rewarding job.

found that one of the drive shaft flanges was starting to fret (rust dust in the cap) , the other appeared to be locktited on!! I thought 90s had 1 piece shafts! so knocked them both off (yes they were very tight) cleaned the splines greased and refitted.

Only driven 30 miles or so but no noticeable difference on the road, once I have about 500 miles on it if its OK will have a go at the front.

PS the diff that came out looks in A1 condition only 20k miles and no abuse DEFENDER 90 TDCI XS,

I hope everyone is well and your land rovers make you happy
Post #642427 7th Aug 2017 5:18pm
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Caterham



Member Since: 06 Nov 2008
Location: Birmingham
Posts: 6260

England 2011 Defender 110 Puma 2.4 XS CSW Stornoway Grey
Hi,

Did you need a spacer between the crown wheel and atb or in lieu of that have you adjusted the bearings?

Any photo to compliment the work Thumbs Up
Post #642445 7th Aug 2017 6:14pm
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LR90XS2011



Member Since: 05 Apr 2011
Location: bickenhill
Posts: 3602

United Kingdom 2011 Defender 90 Puma 2.4 XS CSW Galway Green
Being a 90 its a straight swap and the bearings on the carrier are adjusted to set the backlash and become pre-loaded in the process. (Used new carrier bearings)

Didn't need to touch the pinion bearings as used the original carrier and crown wheel so everything ends up in the same position give or take a few 0.01mm's

everything you need is describes on Ashcrofts web site DEFENDER 90 TDCI XS,

I hope everyone is well and your land rovers make you happy
Post #642457 7th Aug 2017 7:09pm
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Yannis



Member Since: 02 Feb 2015
Location: Oxfordshire / Milan
Posts: 400

United Kingdom 2015 Defender 90 Puma 2.2 CSW Corris Grey
So, if your only replacing the centre of the diff with the ATB and leaving all the other parts the same, it's just mesh and backlash/prelod you need to worry about?

I'm thinking of building these into my diffs but the only guides I can find are full rebuilds rather than just the centre of the diff being swapped.

I have only done 20k miles so don't think it's worth stripping the lot and a full rebuild. (Thoughts)

Cheers
Post #646406 26th Aug 2017 10:51am
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blackwolf



Member Since: 03 Nov 2009
Location: South West England
Posts: 16808

United Kingdom 2007 Defender 110 Puma 2.4 DCPU Stornoway Grey
Correct.
Post #646411 26th Aug 2017 11:28am
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