Your gear oil is constantly working to reduce the stresses placed on your gearbox, keeping it operating at its peak. But like most lubricants, it may eventually need to be changed, otherwise the slow accumulation of deposits can end up clogging your oil gearbox filter and potentially damaging its components, resulting in costly repairs. In this guide, view simple, step-by-step instructions on when and how to check and change your gear oil and filter, ensuring your gearbox keeps working its best.