Special transfer box oil for later Land Rover electronically controlled active transfer boxes, including Discovery 3, Discovery 4 and Range Rover Sport systems requiring IYK500010, TF-0753 or TF-0870.

These transfer boxes require a dedicated fluid with the correct viscosity and controlled friction characteristics. Match the fluid reference to the transfer box rather than selecting a conventional gearbox or differential oil by viscosity grade alone.

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Special Fluid for Later Land Rover Transfer Boxes

Later electronically controlled active transfer boxes use a dedicated transfer fluid rather than a conventional gearbox or axle oil. Ravenol DTF-1 is a PAO-based fully synthetic transfer fluid for systems requiring Land Rover IYK500010, TF-0753 or TF-0870, with controlled friction behaviour and stable viscosity under load.

Vehicle / job Best place to start Check before ordering
Discovery 3 transfer box service Ravenol DTF-1 Transfer Fluid Confirm IYK500010, TF-0753 or TF-0870 is the required fluid reference.
Discovery 4 transfer box service Ravenol DTF-1 Transfer Fluid Confirm the transfer box fluid specification and required service quantity.
Range Rover Sport transfer box service Ravenol DTF-1 Transfer Fluid Match the required fluid reference to the transfer box fitted to the vehicle.
Replacing fluid identified as IYK500010 Ravenol DTF-1 Transfer Fluid Check the vehicle or workshop information against the IYK500010 / TF-0753 / TF-0870 references.

Why These Transfer Boxes Need a Dedicated Fluid

Electronically controlled active transfer boxes place different demands on the lubricant from a conventional manual gearbox or differential. The fluid must provide the correct friction behaviour for the transfer system while maintaining lubrication and protection against wear, corrosion and foam formation.

Ravenol DTF-1 is formulated specifically around these requirements. It is not selected simply because of a familiar viscosity grade: the complete fluid specification and transfer-box design determine the correct lubricant.

Transfer box type
Confirm the vehicle uses the later electronically controlled active transfer box requiring this type of dedicated fluid.
Fluid reference
Check for Land Rover IYK500010, TF-0753, TF-0870 or another confirmed compatible specification.
Vehicle fitment
Discovery 3, Discovery 4 and Range Rover Sport use these fluids on the relevant active transfer-box systems, but transfer-box and model-year splits still need to be matched correctly.
Service quantity
Check the required quantity for the exact transfer box before ordering the number of 1L bottles needed for the fluid change.

Ravenol DTF-1

Ravenol DTF-1 is a fully synthetic PAO-based transfer fluid recommended for Land Rover IYK500010 and transfer-box fluid specifications TF-0753 and TF-0870. Its stable viscosity and controlled friction behaviour suit the electronically controlled transfer system, with protection against wear, corrosion and foam formation.

Related Gear Oil Sections

Section Use it for
Gear Oil The wider gearbox, transfer-box and differential oil range where a different drivetrain lubricant is required.