Monitoring of gear box operation and expected life?

Monitoring of gear box operation and expected life?
It depends on who the manufacturer was, is it an automatic or manual transmission, how long the warranty is valid for, and how often the fluids are changed. If noises and vibrations are coming from your gearbox, odds are that you need to service it, or that it needed to be serviced some time ago. You can tell how well a gearbox operates by how smoothly it shifts. The expected life for most is the same as the expected life of the engine. However, many people do not realize that it needs to be serviced just as an engine does.