Most automatic transmissions fail due to overheating. This is usually a direct result of a lack of maintenance. It’s been estimated that up to 80% of vehicle owners have never serviced their automatic transmission. By servicing your vehicle’s transmission at the specified intervals you will prolong the life of your automatic transmission. You will also reduce the likelihood of an expensive transmission rebuild.
This is especially true if you have a four wheel drive or do a lot of towing. Another great way to extend the life of your auto transmission is to fit an external oil cooler. This will reduce the damaging effects of overheating and significantly add life to the transmission.