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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
@Tatt great news! Who is the mechanic you used?

Btw, I also have a n ATB in the rear diff on my 90, it would be nice to compare the performance when off-road.

Have a look at joining the Cape Land Rover Club - great bunch of people and we do off-road outings once a month or so - www.clrc.co.za 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 #961208 10th Aug 2022 7:10am
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Tatt



Member Since: 04 Oct 2008
Location: Was Castleford, now Cape Town!
Posts: 47

South Africa 2002 Defender 110 Td5 HT Belize Green
Landy Guru.

As mentioned, I had both front and rear diffs done, didn't do the transfer case (it actually completely slipped my mind and I should have thought about this when they rebuilt my gearbox..).

Besides this, LG have done a fair bit of work recently, had the V8 5th gear installed, which works very nicely with the 1.2 Ashcroft did for me around 13 years ago! Can actually hold a conversation when cruising at 100km/h, and this is definitely an upgrade I recommend for TD5's! Also had a double-knuckle front prop installed and a few other bits and bobs..

Got around 180k miles now and my van is 20 years old, so been going through it to make sure it lasts another 20!

Been meaning to join the club for years! Will finally do so tomorrow.

Tom
Post #961273 10th Aug 2022 7:00pm
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LandRoverAnorak



Member Since: 17 Jul 2011
Location: Surrey
Posts: 11240

United Kingdom 2013 Defender 110 Puma 2.2 USW Orkney Grey
I've just joined the club with an Ashcroft ATB in the rear diff of my 110. Very happy so far Very Happy


Click image to enlarge


More details here:

https://www.defender2.net/forum/post961277.html#961277 Darren

110 USW BUILD THREAD - EXPEDITION TRAILER - 200tdi 90 BUILD THREAD - SANKEY TRAILER - IG@landroveranorak

"You came in that thing? You're braver than I thought!" - Princess Leia
Post #961278 10th Aug 2022 7:49pm
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ashtrans
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Member Since: 08 Nov 2008
Location: Harpenden
Posts: 252

United Kingdom 


another 8200 Kg of ATB's came in yesterday ! Dave
Post #961396 12th Aug 2022 6:22am
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Tatt



Member Since: 04 Oct 2008
Location: Was Castleford, now Cape Town!
Posts: 47

South Africa 2002 Defender 110 Td5 HT Belize Green
Wow!!

Going to try mine out this weekend I hope! Studying busy getting in the way of play at the moment!

Tom
Post #961459 12th Aug 2022 5:38pm
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Tatt



Member Since: 04 Oct 2008
Location: Was Castleford, now Cape Town!
Posts: 47

South Africa 2002 Defender 110 Td5 HT Belize Green
Wow!!

Going to try mine out this weekend I hope! Studying busy getting in the way of play at the moment!

Tom
Post #961468 12th Aug 2022 6:22pm
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LandRoverAnorak



Member Since: 17 Jul 2011
Location: Surrey
Posts: 11240

United Kingdom 2013 Defender 110 Puma 2.2 USW Orkney Grey
ashtrans wrote:
another 8200 Kg of ATB's came in yesterday !

I, perhaps naively, thought that you built them, Dave rather than buying them in? Or is that pallet loads of components? Darren

110 USW BUILD THREAD - EXPEDITION TRAILER - 200tdi 90 BUILD THREAD - SANKEY TRAILER - IG@landroveranorak

"You came in that thing? You're braver than I thought!" - Princess Leia
Post #961513 13th Aug 2022 10:26am
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90 Dreamer



Member Since: 13 Jul 2019
Location: Oop North
Posts: 2045

United Kingdom 2016 Defender 90 Puma 2.2 HT Corris Grey
Are they not Quaiffe ?? Most common production one I think ??
Post #961562 13th Aug 2022 5:49pm
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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
Chaps, went off-roading yesterday, and on some cross-axles I struggled a bit, almost like the ATB was not working.

How would I test that it's working as it should? --
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 #992664 15th May 2023 7:19am
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geobloke



Member Since: 06 Nov 2012
Location: Nottinghamshire
Posts: 4348

United Kingdom 
Hi Naks. Sounds like traction was limited - none at times to one wheel which would equal no transfer of power to the opposite wheel. According to Ashcroft's website this can happen in cross-axle situations. Left foot braking would have helped add load to the wheel without traction and diverting some drive to the opposite wheel.
Post #992676 15th May 2023 9:14am
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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
^ yes, I understand.

But if I memory serves correctly, when I first fitted the ATB, I could gently touch the brakes when in cross-axles and the slipping wheel would then 'catch', giving me traction.

this doesn't seem to happen any more, but I could be wrong.

Hence why I would like to know if there's a way of testing in a workshop if the ATB is still working properly. --
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 #992677 15th May 2023 9:16am
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geobloke



Member Since: 06 Nov 2012
Location: Nottinghamshire
Posts: 4348

United Kingdom 
Quote:
^ yes, I understand.

But if I memory serves correctly, when I first fitted the ATB, I could gently touch the brakes when in cross-axles and the slipping wheel would then 'catch', giving me traction.

this doesn't seem to happen any more, but I could be wrong.

Hence why I would like to know if there's a way of testing in a workshop if the ATB is still working properly.


So first thing that springs to mind is, are your brakes as good as they were when you first fitted your ATB? I would suggest they would wear quicker than your ATB. It is remarkable how bad brakes can get a little at a time without you realising. You just compensate as they worsen, right.

As for a test, I do not know I am afraid. Would be worth dropping Ashcroft a line and asking the question.
Post #992680 15th May 2023 9:36am
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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
if your Def has traction control it should work seamlessly with the ATBs DEFENDER 90 TDCI XS,

I hope everyone is well and your land rovers make you happy
Post #992682 15th May 2023 9:41am
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excossack



Member Since: 22 Feb 2012
Location: North West
Posts: 5725

United Kingdom 1999 Defender 110 Td5 SW Caledonian Blue
From
https://ashcroft-transmissions.co.uk/product/ashcroft-atb/

One of the drawbacks of the Torque Biasing centre is that it is always necessary to have some load on one wheel per axle. if there a no load situation eg cross axle the wheel with traction would only see approx three times the load on the wheel with no traction ie nothing!!. To overcome this, as stated earlier, the Ashcroft Torque Biasing centre is fitted with some preload springs to provide some loading to the side with no traction in the event of a cross axle, where this pre-load is not providing sufficient traction to the other side then one favourite trick is to apply a small amount of left foot brake whilst applying more throttle. This manoeuvre fools the diff by providing load to the non-traction side which is multiplied by the Torque Biasing centre (approx 3:1) to the other side, the loss of drive attributed to the brakes which are acting equally on both wheels is overcome by the additional throttle. In a car fitted with Automatic Traction Control this braking all takes effect automatically and the Torque Biasing centre provides additional traction by multiplying the ATC effect. 1999 Defender TD5 110

Regards
John M0VAZ
Econet Station 48 no clock
Post #992685 15th May 2023 9:51am
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LandymanStefan



Member Since: 30 Aug 2017
Location: Surrey
Posts: 860

England 2001 Defender 90 Td5 SW Epsom Green
It seems there are many many good reports on these atb’s. I’ve been considering my diff options recently and it’s either twin atb’s or a rear locker, hd shafts and flanges etc.

My only gripe with the atb is I always come to this video of the chap deliberately getting stuck and cross axling then even with applying the brakes he doesn’t get going again as you’re supposed to.



I would like to have twin atb’s to stop the one wheel tyre fire I get on the front axle when pulling away a bit quick and i think twin atb’s would be ideal when towing my penman off-road too.However one of the main reasons to have a locker over the atb’s would be as a bit of an insurance policy so if I am cross axled I know can flip a switch and get out of there. I have experienced a rear locker in a couple of my friends trucks and I’m always blown away by it, it almost feels like cheating.

I’d be interested to know what everyone’s experience is being crossaxled and does the brake method work? The guy in the video only has one so maybe this would be improved with both. My defender doesn’t have tc to help if I do go down the lsd route either.

I think ultimately my perfect set up would be an atb in the front and a locker in the rear. But then it starts becoming silly money.
Post #1000700 18th Jul 2023 1:08pm
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