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Ashcroft LT230 Torque Biasing Diff


5.0 average, based on 12 reviews

Product Information


We are very pleased to offer the Ashcroft Torque Biasing centre differential for the LT230T.

A little background on the LT230 centre diff.  The centre diff is there to allow the props to turn at different speeds when cornering to stop drivetrain wind up. The speed difference is quite small and the centre diff gears are only designed to cope with these low speeds. If you are Off Road on snow or ice and you get wheelspin from one front wheel, what will happen is the rear prop will not be moving, the front will thus be going double speed, this means the small centre diff gears will be spinning like fury and after a matter of only a few seconds the planet gears will friction weld to the cross pins and the gears will fail etc. Of course in this situation the centre diff should be locked to avoid failure.

There are instances when it's not convenient to keep the diff locked or to constantly lock and unlock the diff as the available traction dictates, i.e,  when racing fast on a low traction surface, the vehicle will not handle well when locked but is likely to wheel spin when unlocked. 

Another example of where the Ashcroft Torque Biasing Centre  would help would be when rapidly changing from high to low traction surfaces,  i.e. when driving on snow or ice,

In both of these examples the Ashcroft Torque Biasing  will limit the amount the difference in propshaft speed and transfer torque to the axle with traction.

The two big advantages are increased traction when unlocked and eliminating the weakness of the stock unlocked centre diff.

Note the Ashcroft Torque Biasing centre can still be locked like the stock unit when required, locking the diff is still advised when prolonged wheel spin is anticipated.

Please note : We are also able to supply a fitting kit which includes additional parts you may require, click here

When an Ashcroft Torque Biasing is ordered to be built within a rebuilt LT230 the price will be reduced to £ 300.

We make 2 different types of these as there are 2 different diameters of spline used for the high/low selector hub, the one you need can be identified by either the serial number or vehicle type,


Type A - RRC, Disco 1, all Defender pre TD5, Serial numbers starting 20D, 22D, 25D, 26D, 28D, 29D, 36D   


Type B - Disco 2, TD5 and TDCi Defenders, Serial numbers starting 41D, 42D, 43D, 57D, 60D, 61D, 62D, 68D, 69D, 70D, 80D, 81D


Note : Due to the nature of the Torque Biasing diff we do not recommend the vehicle is brake tested on rollers, ask for a decelerometer to be used instead.



Product Code: LT230TorqBias

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Customer Reviews

[1] 2 3 > View All Average Rating: 5

Différentiel à glissement limité

Un petit commentaire pour les Français qui hésitent encore: J'ai monté ce type de différentiel à glissement limité dans la LT230 de mon Td4 2.4 franchement ça transforme votre véhicule. Maintenant le passage des vitesses de la LT82 est un vrai régal ce qui n'était pas du tout le cas avant. Franchement je ne regrette pas ce choix. Pour un collègue , je suis même en train d'en refaire une autre.

Joël Delhoste :: May 31 2021, 16:53 PM

ATB Diff when Braking

I don't see any mention of the benefit when braking. I run it on a 2 door RR. It is great for pulling in loose sand or mud but also improves braking particularly giving confidence when descending at high angles on loose surfaces with no ABS.

Trevor Kent :: Mar 02 2020, 10:45 AM


Had the ATB in for some years now. I have a very tricked td5 defender with around 200hp at the flywheel. Have towed a 23 ft caravan for 12000km. I find it amazing on gravel roads at silly speeds-when the rear let's go drive transfers to the front axle and stabilizes the vehicle. Overall safety factor has increased a lot and there have been 0 problems. I do run increased oil capacity and use Castrol Syntrax 80/140 fully synthetic oil as the standard oil viscosity is not adequate for our hot weather in oz with extended towing and heavy work.

David Mills :: Jan 28 2020, 01:47 AM

Every LR should have one

This is the second one that I've fitted - LR should have fitted these as standard. I now have zero backlash in my MY13 90 - its a pleasure to drive and I now feel connected to the road again. Works a treat on gravel roads out in Australia. Thanks Dave! Top bit of kit.

James :: Oct 04 2018, 02:38 AM


RRC 200 TDi I just replaced the BW with the LTA230 28D whit ATB...that was what was needed!!! absolute perfection at the wheel. practically indispensable especially for those who have BW.never again no problem. Molto bene!!! finalmente una Range degna di tal nome. GRAZIE!

danilo :: Jun 24 2018, 17:10 PM

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