The type of gearbox (gearbox) for which the oil is designed.
— manual transmission. Manual transmissions are relatively unpretentious — to the point that some of them (in front-wheel drive cars) work fine even with ordinary engine oil. Therefore,
transmission oils for manual transmissions as a whole differ little from motor oils, although they have their own specifics.
— automatic transmission.
Automatic transmissions require the use of special low viscosity fluids. Therefore, a separate category of gear oils, also called ATF, is produced for them.
— Variable speed drive. A variator is a device that can smoothly (steplessly) change the gear ratio. Such devices are used in the transmission of some types of motor vehicles (motor scooters, ATVs), less often — in cars (in particular, "hybrids"). CVTs are often considered as a type of automatic transmission, but this is wrong, because. there are separate gears in the automatic transmission, but here they are not. Therefore,
CVT oils have a special composition.
Note that checkpoints of the same type can differ markedly in design features. Therefore, compatibility with the type of gearbox installed in the car does not yet guarantee compatibility with this particular transmission.
Manufacturer approvals for the gear oil.
Tolerances are the own standards of major automakers, developed taking into account the technical features of individual car models. If the oil meets the tolerance specified in the documentation for the machine, then it takes into account these technical features and is optimally suited for this model.
