Defender with Ashcroft ATB's





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  1. #1
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    Default Defender with Ashcroft ATB's

    Is there any one out there running a defender with ATB's? How good- read that as how much difference do they make on gravels/sand roads and also tough rock crawling?
    If so how often do you need to engage the centre diff lock and do you use any special oils in the diffs or just the standard EP 80/90 gear oil?

    Thanks

  2. #2
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    Default Re: Defender with Ashcroft ATB's

    Quote Originally Posted by tripodontour View Post
    Is there any one out there running a defender with ATB's? How good- read that as how much difference do they make on gravels/sand roads and also tough rock crawling?
    If so how often do you need to engage the centre diff lock and do you use any special oils in the diffs or just the standard EP 80/90 gear oil?

    Thanks
    The guy who makes them-Dave Ashcroft is a member here,nobody better to ask

    But from personel experience his lockers are brilliant...
    Engage centre diff lock anytime you're on loose surfaces including rock crawling(only way to get true 4X4)
    I used normal oil for my diffs with his lockers
    A legend in his own mind

  3. #3
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    Default Re: Defender with Ashcroft ATB's

    Many thanks Bob.

    I've already ordered mine but I just wanted to make sure before I fit them next week.
    I'm looking forward to see what difference they make and I will report back. Last week I did a trial run on a big incline and failed pretty spectacularly, hopefully will have positive run once fitted!!!!

  4. #4
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    Default Re: Defender with Ashcroft ATB's

    Quote Originally Posted by tripodontour View Post
    Many thanks Bob.

    I've already ordered mine but I just wanted to make sure before I fit them next week.
    I'm looking forward to see what difference they make and I will report back. Last week I did a trial run on a big incline and failed pretty spectacularly, hopefully will have positive run once fitted!!!!
    Just keep in mind that having better traction also puts more strain on the drive train,so it's common to snap drive shafts etc -I know
    But like any mod,it's never just the one upgrade........
    A legend in his own mind

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    Default Re: Defender with Ashcroft ATB's

    Hi Bob
    I won't tell you the total price landed here but on the pallet there are H/D C/Vs, drive shafts and drive members I think I need all that with a 4.6 in it, but the auto box does smooth out the delivery of the power: I hope!!!!!

  6. #6
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    Default Re: Defender with Ashcroft ATB's

    Quote Originally Posted by tripodontour View Post
    Hi Bob
    I won't tell you the total price landed here but on the pallet there are H/D C/Vs, drive shafts and drive members I think I need all that with a 4.6 in it, but the auto box does smooth out the delivery of the power: I hope!!!!!
    You NEED to post pics,PLEASE
    A legend in his own mind

  7. #7
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    Default Re: Defender with Ashcroft ATB's

    I installed an Ashcroft ATB in the rear axle of my 90.

    I've only been off-road once, and although I couldn't really feel the difference, others kept saying how easy I was making it look. The trail wasn't anything difficult, so that's probably why.

    On tar, I have noticed that the 90 doesn't rotate around traffic circles quite as snappily as it used to, but that's about it.
    2010 Defender Puma 90 + BAS remap + Alive IC + Slickshift + Ashcroft ATB rear
    2015 Range Rover Sport Supercharged V8 HSE Dynamic



    Discovery 4 Workshop Manual: https://bit.ly/2zZ1en9

    Defender Puma Workshop Manual: https://bit.ly/2zXrtKO
    Range Rover/Sport L320/L322/L494 Workshop Manual: https://bit.ly/2zc58JQ

  8. #8
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    Default Re: Defender with Ashcroft ATB's

    Quote Originally Posted by tripodontour View Post
    Is there any one out there running a defender with ATB's? How good- read that as how much difference do they make on gravels/sand roads and also tough rock crawling?
    If so how often do you need to engage the centre diff lock and do you use any special oils in the diffs or just the standard EP 80/90 gear oil?

    Thanks
    Hi Pete

    I had the Eaton Truetracs in my Disco1. Ashcroft are cheaper and equally good if not even better. ATB's will give you at best a 75/25% traction split per wheel on one axle. But add a little foot brake and you will go just about anywhere. And as a bonus they will save your sideshafts.

    When using ATB's use this oil:

    https://www.castrol.com/en_nz/new-ze...d-slip-90.html

    Do not under any circumstances use a synthetic diff oil.

    You will be amazed, how far you will get with those ATB's.

    Always remember an ATB will channel drive (per axle) to the wheel with the most traction.

    You will be very happy with your purchase.

    kind regards


    George
    Last edited by hgbosch; 2017/11/04 at 03:27 PM.
    George Bosch
    2003 RangeRover Vogue 3.0 Td6 (Mine) / 2005 LR Disco3 TDV6 S (Swambo's) / 1998 Disco1 Tdi ES (Sold) / And some more serious stuff

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  9. #9
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    Default Re: Defender with Ashcroft ATB's

    I am pretty much sold on Ashcroft Atbs

    I plan to get three, including the center diff
    The question I have is how hard it is to install ARB on lt230?
    Cheers

  10. #10
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    Default Re: Defender with Ashcroft ATB's

    Quote Originally Posted by hgbosch View Post
    Hi Pete

    I had the Eaton Truetracs in my Disco1. Ashcroft are cheaper and equally good if not even better. ATB's will give you at best a 75/25% traction split per wheel on one axle. But add a little foot brake and you will go just about anywhere. And as a bonus they will save your sideshafts.

    When using ATB's use this oil:

    https://www.castrol.com/en_nz/new-ze...d-slip-90.html

    Do not under any circumstances use a synthetic diff oil.

    You will be amazed, how far you will get with those ATB's.

    Always remember an ATB will channel drive (per axle) to the wheel with the most traction.

    You will be very happy with your purchase.

    kind regards


    George
    Why should you not use synthetic oil?
    2010 Defender Puma 110
    Bushlapa Boskriek B472

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  12. #11
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    Default Re: Defender with Ashcroft ATB's

    I had full set ARB's in my TD5 Defender - a thing of beauty to behold in the hard stuff.
    just be careful on the loud pedal - you CAN drive all the power to ONE wheel.
    Merit before Race - anything else IS Racism.
    Stay Calm, engage low-ratio, keep buggering on - a Landy Man
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  13. #12
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    Default Re: Defender with Ashcroft ATB's

    Quote Originally Posted by hgbosch View Post
    When using ATB's use this oil:

    https://www.castrol.com/en_nz/new-ze...d-slip-90.html

    Do not under any circumstances use a synthetic diff oil.

    George, after I went off-road for the first time with the ATB, I started noticing a dull vibration (especially when coasting) which seems to be coming from the transfer box or further back.

    Do you think the wrong oil could cause this?
    2010 Defender Puma 90 + BAS remap + Alive IC + Slickshift + Ashcroft ATB rear
    2015 Range Rover Sport Supercharged V8 HSE Dynamic



    Discovery 4 Workshop Manual: https://bit.ly/2zZ1en9

    Defender Puma Workshop Manual: https://bit.ly/2zXrtKO
    Range Rover/Sport L320/L322/L494 Workshop Manual: https://bit.ly/2zc58JQ

  14. #13
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    Default Re: Defender with Ashcroft ATB's

    Quote Originally Posted by Orxy View Post
    George, after I went off-road for the first time with the ATB, I started noticing a dull vibration (especially when coasting) which seems to be coming from the transfer box or further back.

    Do you think the wrong oil could cause this?
    The ashcroft site specifically says "needs no special oils" and does not warn against synthetic oils?
    2010 Defender Puma 110
    Bushlapa Boskriek B472

  15. #14
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    Default Re: Defender with Ashcroft ATB's

    OH BUGGGRE


    Unfortunately I stopped reading about the Ashcroft ATB's on their website when I got to the part that says they can be fitted to the front and rear axle.. I did not read the little passage further down that said it is not suitable for the Salisbury axle!!!!

    Looks like I am going to have to order a true trac for the rear and have an extra Ashcroft one, for the front, sitting in my store room. Shipping cost to the UK for a return is rather expensive.

    The worse thing in all this is another months delay.

  16. #15
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    Default Re: Defender with Ashcroft ATB's

    Quote Originally Posted by tripodontour View Post
    OH BUGGGRE


    Unfortunately I stopped reading about the Ashcroft ATB's on their website when I got to the part that says they can be fitted to the front and rear axle.. I did not read the little passage further down that said it is not suitable for the Salisbury axle!!!!

    Looks like I am going to have to order a true trac for the rear and have an extra Ashcroft one, for the front, sitting in my store room. Shipping cost to the UK for a return is rather expensive.

    The worse thing in all this is another months delay.
    If I may be so blunt to ask...price for your spare? Iím sure there are many interested parties... including myself
    1985 Land Rover 110 - 300tdi conversion


    It's always more fun on the road less travelled

  17. #16
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    Default Re: Defender with Ashcroft ATB's

    Quote Originally Posted by iLandy View Post
    If I may be so blunt to ask...price for your spare? Iím sure there are many interested parties... including myself

    I'm in 3 minds of what to do at the moment.
    Option 1: I am flying "home" to the UK for a month over Christmas and Ashcrofts have offered to take my ATB back and refund against a true trac.
    Option 2: I am also considering keeping it as a spare as I will never find another in Zambia, but how realistically will the one fitted fail.
    Finally option 3, I will be travelling to Jo'burg early next year, so I would be able to bring it down, to sell, if any one was interested. ( sorry Dirk and mods, I hope I am allowed to say that here)
    As for price I will have to check my shipping and import duties to Zambia: but believe me they were more than what I expected.

    As for the ATB itself it cost me GBP 325.00 direct from ashcroft.

  18. #17
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    Default Re: Defender with Ashcroft ATB's

    trip, if I were you, I would go for Option 1, as the Ashcroft stuff very, very rarely fails.
    Last edited by Orxy; 2017/11/08 at 04:51 PM.
    2010 Defender Puma 90 + BAS remap + Alive IC + Slickshift + Ashcroft ATB rear
    2015 Range Rover Sport Supercharged V8 HSE Dynamic



    Discovery 4 Workshop Manual: https://bit.ly/2zZ1en9

    Defender Puma Workshop Manual: https://bit.ly/2zXrtKO
    Range Rover/Sport L320/L322/L494 Workshop Manual: https://bit.ly/2zc58JQ

  19. #18
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    Default Re: Defender with Ashcroft ATB's

    chaps, since my previous post, the groaning noise has become quite bad.


    My indie and I eventually traced it to the rear diff: at specific rpm/speed, there is a loud, low-frequency groaning noise + vibration emanating from the rear of the car. It almost feels as if the seats have built-in massage function, especially when I hit 80-100kmh.


    Has anyone else experienced this after fitting an Ashcroft, and if so, how did you fix this?


    thanks
    2010 Defender Puma 90 + BAS remap + Alive IC + Slickshift + Ashcroft ATB rear
    2015 Range Rover Sport Supercharged V8 HSE Dynamic



    Discovery 4 Workshop Manual: https://bit.ly/2zZ1en9

    Defender Puma Workshop Manual: https://bit.ly/2zXrtKO
    Range Rover/Sport L320/L322/L494 Workshop Manual: https://bit.ly/2zc58JQ

  20. #19
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    Default Re: Defender with Ashcroft ATB's

    Forget about keeping a spare- you won't need it.
    I drowned mine and it rusted badly and was popping and banging something scary. I emailed Dave Ashcroft for advice and he explained how to rebuild it, which I did, with no spares needed- just a major wire brushing to all the parts. That thing is built very strong
    Rob
    V8 Defender 90 pickup. Lexus, Spitronics, 33" KL71, beadlocks, +2" Terrafirma, ATB's, 3.75 CW&P, 1.21 TC.
    Series IIA 88" pickup
    Disco 2 ES TD5
    Disco 1 ES 300TDi
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    Porsche Boxster S
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  22. #20
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    Default Re: Defender with Ashcroft ATB's

    Quote Originally Posted by Orxy View Post
    chaps, since my previous post, the groaning noise has become quite bad.


    My indie and I eventually traced it to the rear diff: at specific rpm/speed, there is a loud, low-frequency groaning noise + vibration emanating from the rear of the car. It almost feels as if the seats have built-in massage function, especially when I hit 80-100kmh.


    Has anyone else experienced this after fitting an Ashcroft, and if so, how did you fix this?


    thanks
    Mine was like that after I drowned it, then it got way worse. But all the bearings had failed too which I think was what caused the rumble. I assume you used new bearings throughout and set the backlash and meshing correctly?
    Opening and inspecting the ATB is easy. Nothing springs apart and the only thing you need to worry about is a pack of belleville washers in the middle- you need to note how they are placed and put them back the same. And everything needs to be nice and oily when assembling
    Rob
    V8 Defender 90 pickup. Lexus, Spitronics, 33" KL71, beadlocks, +2" Terrafirma, ATB's, 3.75 CW&P, 1.21 TC.
    Series IIA 88" pickup
    Disco 2 ES TD5
    Disco 1 ES 300TDi
    Subaru impreza WRX
    Porsche Boxster S
    Shamrock Cobra 350
    MG TF160 VVC ZandF remapped
    Buell XB12R

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