Top up transmission oil - Tips and tricks
Similar to engine oil, transmission oil can lose volume due to constant load or leakage. If the oil level in the transmission unit drops too low, inadequate lubrication occurs, which promotes wear and corrosion in the transmission unit.
Top up transmission oil in a manual gearbox
Oil level measurement in a gearbox is not always possible without problems. Manual gearboxes usually do not have an oil dipstick. The oil is filled in by the manufacturer and normally only needs to be changed when repairs to the gearbox become necessary. However, if your gearbox makes noises or is stuck regularly, it is worth having it checked by a workshop. These can be signs of additive degradation. However, it may also indicate a low oil level. In this case, the oil level can be replenished before long-term damage occurs. If necessary, a problem that led to a drop in the oil level can also be solved. If a car loses transmission oil, this may be due to the following causes:
- Defective sealing rings on the clutch side (oil escapes between engine and transmission housing)
- Leakage at the oil drain plug, filler plug or housing seal (oil leaks from the drive or cardan shaft)
Top up transmission oil in an automatic transmission
Automatic transmissions often have an oil dipstick. Where this can be found is given in the operating manual. If your car is not equipped with an oil dipstick, the level can possibly be checked via an electronic device. We do not recommend manual testing in a sealed gearbox. This is a complicated process that requires good craftsmanship. In this case, have the oil level checked by a workshop, e.g. during the annual inspection.
If you have an oil dipstick for your gearbox, you can read the level as on the engine. Pull out the dipstick, clean it and re-insert it. Afterwards you can recognize the level by the marking. If the oil level in the transmission unit is actually too low, top up the suitable transmission oil in small quantities. Check the oil level again and again until the desired quantity is in the transmission unit. Too much oil should not be filled either, as the oil pressure will then no longer be correct. Draining the transmission oil is also quite complicated.
