4×4S.ORGTHE REGISTRY DRIVELINE · DIFF
DiffDrivelineCommon

Ashcroft ATB limited-slip differential (Rover axle)

Ashcroft Transmissions · United Kingdom · dates not recorded

A helical-gear automatic torque-biasing limited-slip differential with six gear pockets and preload springs, giving a 2:1 bias ratio with no driver input and no effect on road manners, made by Ashcroft Transmissions of Luton for the 24-spline Rover-type axle (Defender 90 front and rear, 110 front, Discovery 1 and 2, Range Rover Classic 1986-94). A Salisbury-axle version is made separately.

SourcesMore driveline
PHOTOGRAPH WANTED
—MADE£335 (2026)CURRENT PRICECommonRARITY4LAND ROVER MODELS2SOURCES

Description

A helical-gear automatic torque-biasing limited-slip differential with six gear pockets and preload springs, giving a 2:1 bias ratio with no driver input and no effect on road manners, made by Ashcroft Transmissions of Luton for the 24-spline Rover-type axle (Defender 90 front and rear, 110 front, Discovery 1 and 2, Range Rover Classic 1986-94). A Salisbury-axle version is made separately.

Rover banjo axles with 24-spline side gears and metric bearings; not the 110 rear Salisbury (separate AATB).

Rarity. The most common British-made traction differential for coil-sprung Land Rovers, in continuous production at Ashcroft's Luton works and stocked by Paddock and LR Parts.

Record: 2 sources; designation recorded; price recorded; production dates not established.

Specification

MAKERAshcroft Transmissions, United Kingdom
DESIGNATION / PARTAATB Rover 24-spline (Paddock PM1189, LR Parts DA9011); Salisbury version separate
MADEdates not recorded
PRICE IN 2026£335 — Ashcroft Transmissions list price ex VAT
RARITYCommon — The most common British-made traction differential for coil-sprung Land Rovers, in continuous production at Ashcroft's Luton works and stocked by Paddock and LR Parts.
TYPEhelical gear ATB, 6 pockets
BIAS RATIO2:1
SPLINES24
OILEP80/90, no friction modifier
MAKER LOCATIONStadium Estate, Cradock Road, Luton
WARRANTY MONTHS12

Fitment

Rover banjo axles with 24-spline side gears and metric bearings; not the 110 rear Salisbury (separate AATB).

Variants

AATB Salisburycurrent

For the Defender 110/130 Salisbury rear axle

Sources

ashcroft-transmissions.co.uk/product/ashcroft-atb/paddockspares.com/pm1189-ashcroft-limited-slip-diff-atb.htmlEvery source above was fetched and read when the record was made.