APPLICATION: This SAE Standard is intended for equipment manufacturers in defining and recommending axle and manual transmission lubricants@ for oil marketers in labeling such lubricants with respect to viscosity@ and for users in following their owner's manual recommendations. The SAE viscosity grades shown in Table 1 constitute a classification for axle and transmission lubricants in terms of viscosity only; the change in viscosity with use@ or other gear lubricant qualities@ are not considered.
SAE J306-1985 history
2019SAE J306-2019 AXLE AND MANUAL TRANSMISSION LUBRICANT VISCOSITY CLASSIFICATION