In order to be able to ensure a malfunction-free operation, modern gearboxes require a modern high-performance lubricant, which protects the gearbox against friction and, at the same time, does not affect the shifting characteristics. The type and quantity of additives in the lubricant has a significant influence on various parameters, such as the shifting capacity, the change interval, the friction behavior and the wear protection. It is therefore urgently necessary that the classifications or approvals given by the manufacturer are upheld upon changing the gearbox oil. There are as many gearbox oils as there are types of gearbox. They are first roughly differentiated by manual gearbox or axle drive, automatic gearbox and dual-clutch gearbox. Within these upper groups there are various subgroups, which each need a special lubricant aligned to the construction type and purpose of use. In gearbox oils there is no uniform basis that the manufacturers are obliged to uphold (e.g. ACEA). This leads to a variety of special manufacturer approvals.
EXAMPLES
Mercedes-Benz:
24 ATF approvals (MB approval 236.x)
21 (Hypoid) gearbox oil approvals (MB approval 235.x)
Volkswagen:
14 ATF approvals (G 052 xxx, G055 xxx, G060 xxx)
15 (Hypoid) gearbox oil approvals (G 052 xxx, G055 xxx, G060 xxx)