The oil of the transmission is one of the components that we must monitor for the proper functioning of the engine system, so it will need preventive maintenance that may or may not entail a change of oil.
This detail must be looked up in the recommendation indicated by the manufacturer in the maintenance book and based on the type of transmission that they install, as there are different types (manual or automatic) and each has specific maintenance needs.
In general, we can say that:
· Synchronized or non-synchronized manual transmissions: oil in manual transmissions normally lasts for a lifetime, and is only changed when a repair is made to the transmission itself or because there are indications that the oil may be the cause of a malfunction. The main indications we can note are:
- Resistance of the system to changing gears in the cold.
- Continued resistance when changing gears.
- Grinding effect when changing gears.
- The gears slip once they are locked.
Automatic transmissions: depends on the type of transmission you have (DSG, VTC, PDK, etc.) and the type of use of the gearbox. Always follow the manufacturer's recommendations, although 60,000 km is generally considered ideal for an oil change. The clearest signs that alert us that our automatic transmission needs an oil change are:
- Slower gear changes.
- Excessive rpm drop when shifting up.
- Loss in the smoothness of gear shifting.
Given all the above, the oil of a transmission (automatic or manual) is subject to maintenance. In the event it needs to be changed, the type of transmission and the manufacturer's specifications must be taken into account, as the oils used are specific for each application and also its characteristics.