TRIAX DTF-1 Professional is a full-synthetic drive train and active transfer case fluid engineered for the demanding friction, load, and thermal requirements of modern active 4×4 and AWD coupling systems. The full-synthetic base oil platform combined with shear-stable VI improvers and a precision-tuned additive system — including extreme-pressure additives, friction modifiers tuned for clutch-pack and chain-driven couplings, anti-wear chemistry, and corrosion inhibitors — delivers exceptional load-carrying capacity, smooth predictable engagement, and outstanding component protection. Designed to exceed the performance requirements of OEM factory fluids and after-market transfer case fluids for BMW, Audi, Porsche, Land Rover, Chrysler (Dodge RAM and others), Mercedes Benz and many others. See detailed spec list.

• Active-coupling friction control: Delivers smooth, predictable engagement in modern 4×4 and AWD systems (BMW xDrive, Audi Quattro, VW 4Motion) without slip, judder, or harsh lockup. Smooth, predictable drive engagement under sudden torque application, hard acceleration, hard cornering, and heavy off-road loading
• Extreme drain capability: Oxidation and shear stability provide for drain intervals up to 100,000+ miles (When OEMs do not recommend drain intervals)
• High load capacity and significant wear reduction for transfer case gears, bearings, and chain-drive components under sustained high-torque operation
• Wide operating range: -50 °C (-58 °F) pour point ensures instant cold-start engagement in extreme climates; full performance retention at sustained high operating temperatures
• Excellent heat transfer keeps transfer case operating temperatures low — extending bearing, clutch, and seal service life
• Fill-for-life service in properly sealed transfer cases when the vehicle OEM does not specify a change interval

• BMW DTF-1 Fluid
• Mercedes Benz Genuine Transfer Case Oil
• Ford Transfer Case Fluid