Just like changing your engine oil, replacing your transmission fluid will help you get the most life out of your vehicle’s transmission.
Automatic transmission fluid lubricates, cools and cleans internal components of the transmission. It also helps to maintain the hydraulic pressure necessary for the transmission to function.
Over time and with use the fluid in your transmission breaks down due to the high operating temperatures and pressures inside your vehicle’s transmission. The transmission fluid will become contaminated with the normal byproducts of friction and wear of the many moving parts inside your transmission.
Degraded fluid cannot properly lubricate or protect your precision-machined transmission parts.
Some of the material that wears off of these parts becomes suspended in the fluid, creating an abrasive mixture that causes further wear through out your transmission.
Many automatic transmissions also have an internal fluid filter that can become restricted with these contaminants and affect the operation of the transmission. This also needs to be changed when the fluid is replaced.