JASO ATF D-II

JASO ATF D‑II is a Japanese standard that defines the requirements for transmission fluids for automatic gearboxes, particularly for motorcycles with a continuously variable transmission (CVT) and light automotive automatic transmissions, where stable viscosity, high oxidation resistance and effective protection of friction plates and seals are required. The specification provides controlled variation of the friction coefficient, rapid heat dissipation, low foam and long‑lasting anti‑wear action, which ensures smooth gear shifts and prevents premature wear. Fluid that meets JASO ATF D‑II is suitable for engines with automatic transmissions installed in scooters, mid‑range motorcycles and some passenger cars that require compatibility with Japanese OEM requirements. In the XENUM catalog this designation helps technicians quickly find, for example, the transmission oil XA‑TRAN DX VI, which complies with D‑II and simultaneously meets the requirements of modern synthetic formulas.