Ashcroft Automatic Torque Biasing Differential – Rover Diffs
Ashcroft Automatic Torque Biasing Differential for Rover type diffs. The Ashcroft ATB is a fully automatic traction upgrade that works with no driver input, while remaining transparent in normal road use.
- Improves traction when one wheel loses grip by biasing torque across the axle
- Fully automatic operation with no switches or driver input
- Transparent on road, with no unwanted harshness in normal driving
- Only comes into play when there is a wheel-speed difference across the axle
- Enhances Land Rover traction control by multiplying the braking load created by the system
- Helical gear design with no adjustment needed as the gears compensate for wear
- Only suitable for 24 spline Rover type diffs
This Ashcroft ATB is for Rover type diff fitment only and is not suitable for Salisbury/Wolf/P38 axles.
£453.40 inc. UK VAT
Normal Stock Item
Family-run Land Rover parts specialist supplying Genuine, OEM & trusted aftermarket parts.
Free mainland UK shipping £99+ · Express options available
Worldwide Tracked Delivery Available
Description
The Ashcroft Automatic Torque Biasing Differential is a serious traction upgrade for Rover type diffs. It replaces the standard open diff centre and automatically biases torque across the axle when one wheel starts to lose grip. On the road it remains transparent, so the vehicle still drives normally without the harshness of a locked differential or the driver involvement of a selectable locker.
The Ashcroft ATB comes into play when there is a wheel-speed difference across the axle. In normal driving, it allows the left and right wheels to rotate at different speeds as usual. When traction is lost on one side, the helical gear design biases drive towards the wheel with more grip. This makes it a great upgrade for mixed road and off-road Land Rovers used on wet grass, mud, snow, sand, loose climbs, towing sites, green lanes and slippery tracks.
For vehicles with Land Rover traction control, the ATB works with the braking effect created by the traction control system. Instead of the traction control simply braking a spinning wheel, the ATB multiplies that braking load through the diff and sends more drive to the wheel with grip. This makes the standard traction control system work harder and more effectively.
The helical gear design also avoids the normal compromises of a plate-type limited slip differential. There are no clutch plates to preload and no adjustment needed as the unit wears, because the gears compensate for wear during use. We recommend good-quality EP80/90 oil and do not recommend friction additives or modifiers.
Fitment Notes
- For Rover type diffs using 24 spline side gears and metric casing/bearings
- Can be fitted to the front or rear Rover diff position
- Not suitable for Salisbury axles
- Matching journal bearings are RTC3095
- Vehicles fitted with a torque biasing differential should not be brake tested on rollers; use a decelerometer instead
Front axle fitment can give slightly stronger steering self-centre when coming out of a corner, especially when first fitted, but this normally reduces as the ATB beds in. Rear axle fitment is normally not noticeable in everyday road driving until extra traction is needed.
If the diff housing has previously been pegged using the older welded-plate method, the outside diameter of the ATB may need machining to 162mm before fitting. Current pegged housings manufactured with additional material for pegging do not normally need this machining work.
Additional information
| Weight | 9.5 kg |
|---|---|
| Dimensions | 35 × 35 × 35 cm |
Brand
Brand
Ashcroft Transmissions
Reviews (0)
Only logged in customers who have purchased this product may leave a review.
Delivery
Twinwoods 4x4 ships Land Rover parts across the UK and around the world. We regularly send parts overseas and use trusted tracked courier services so UK and international customers can order with confidence.
Standard UK shipments are normally sent with DPD. UK orders containing oils or fluids are normally sent with DHL where required, because some carriers restrict liquid shipments.
Worldwide delivery is available through DPD and DHL Express, depending on the destination, parcel size, weight and available courier services. Add the parts you need to your basket, enter your delivery address, and the checkout will show the available delivery options and prices before payment.
Free mainland UK postage and packaging is available on eligible orders over £99, subject to our delivery terms and conditions.
Returns
14-day returns
Unopened & unused
Faulty? We cover postage
- Return within 14 days of delivery of your order.
- Items must be unused, unopened and in original packaging.
- Faulty items: we’ll cover return postage—keep your receipt.
- Refunds & Replacements are dealt with once the original item is received and inspected.
Non-returnable: non-stock/order in/special orders and genuine Land Rover parts (unless faulty).
Returns – quick FAQs
How long do I have to return an item?
14 days from receipt of your order.
Who pays return postage?
We cover it if the item is faulty—please keep your postage receipt.
What items are non-returnable?
Non-stock/special orders and genuine Land Rover parts (unless faulty).
How do I start a return?
Contact us
Please include your order number and a brief reason for the return.
Warranty
Buy with confidence: all new parts sold by Twinwoods 4x4 include at least 12 months manufacturer warranty against defects in materials and workmanship under normal use.
Some products and brands may include a longer warranty period where this is provided by the manufacturer. Where applicable, this will normally be stated on the individual product page or covered by the manufacturer’s own warranty terms.
Warranty cover applies to manufacturing defects. It does not cover misuse, incorrect fitting, competition use unless stated, contamination, modification, damage during installation, normal wear and tear, or failure caused by an unrelated vehicle fault. For certain components, proof of professional fitment may be required.
Warranty claims may require the part to be returned for inspection and/or supplier testing before the claim is accepted. Any advance replacement is discretionary.
Warranty remedies relate to the part itself, meaning repair or replacement, or refund if those are not possible. Warranty does not cover labour, removal or refitting, diagnostics, consumables, travel or other incidental costs.
This warranty is in addition to your legal rights and does not reduce those rights.
For full details, please see our Terms and Conditions.
Reviews
There are no reviews yet