Telephone: +44 1582 496040

Ashcroft LT230 ATB Diff


5.0 average, based on 9 reviews

Product Information

We are very pleased to offer an automatic 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 ATB 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 ATB 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 ATB 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 ATB 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 

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



Product Code: LT230ATB

Related Products

Customer Reviews

[1] 2 > View All Average Rating: 5

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

Excellent service

Ordered on a Monday and delivered to my door in Australia on the following Friday. Will be installing on the next service along with the MT-82 wet output shaft. The improvement will be well worth it.

George Steel :: Nov 03 2017, 05:21 AM

central ATB in Defender PumA 90

Installed the central ATB after parts of the rover spider gear thrust washers turned up in the oil along with excessive driveline play. The Ashcroft central ATB has eliminated the excessive driveline play/backlash, we now have much smoother gear changes with the MT82 box, improved on road handling, quieter running, improved off road traction. In short the install has totally transformed the vehicle, every Defender should have one

Hamish Wells :: Sep 29 2017, 20:37 PM

Great upgrade

I just finished installing the ashcroft mt82 output shaft and centre diff ATB. Wow what a difference! I have e-lockers both front and rear and to say that my vehicle has no clunking whats so ever is a understatement. The car feels amazing, the ATB just makes the drive feel planted and the car almost unstoppable. Great mod! The only issue i have is at very low rpm in a second it shunts a little bit making a strange noise but quickly disappears as the revs pick up. I don't know if this is a result of the ATB itself or whats going on. It doesn't really concern me but it wasn't doing this before the ATB. Anyway love this mod and highly recommend it.

Fernando :: May 28 2017, 08:47 AM

[1] 2 > View All Write a review


Copyright © Ashcroft Transmissions Ltd 2016

Mobile Site

loadContent('admin.order_received'); print_r($content); ?>