have been developed for heavy-duty transmissions. Depending on the application, different base oils are used for the respective purpose. This starts with the general mineral gear oils for the industry as CLP ISO VG 68 to ISO VG 680.
The EAL Bio gear oils can be found here on the pages pure fluid - pure GearOil
For claimed or appropriately designed transmissions, the transmission oil may consist of polyalphaolefins, synthetic esters or other base fluids.
Please pay attention to sealing tolerances and mixing requirements or incompatibilities.