Did you know that a general rule of thumb is that the life of your final drive gearbox is proportional to how frequently the oil is changed? Thats why one of the important maintenance tasks for a final drive is to regularly check the oil on the planetary side. Ideally, you should check the oil level about once every 100 hours of operation, and change the oil out at least once a year.
Here are some tips to help you do this as painlessly as possible.