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The Role of Transmission Fluid Blog

Posted on September 06, 2017.

Most drivers know that there are two types of transmissions: automatic and manual.  However, those who are not car enthusiasts are unaware of what goes on inside a transmission and the role of transmission fluid.  Transmission fluid is used to lubricate the inner moving components of a vehicle’s transmission.  There are different types of transmission fluids and depending on what type of vehicle you have, your transmission fluid might differ from others.  Automatic transmissions use regular automatic transmission fluid. It serves as a coolant and a thick fluid that transmits power from the engine to the transmission.  Manual transmissions have a variety of transmission fluids to choose from.  You can either use regular motor oil, heavyweight hypoid gear oil, or even automatic transmission fluid in some cases.  When in doubt, your vehicles owner’s manual will tell you what your transmission uses.

The primary function of a vehicle’s transmission fluid is to lubricate the various parts of the transmission but it serves other functions as well.  For example, transmission fluid cleans and protects metal surfaces from wear, enhances the cooling function, reduces high operating temperatures, and increases rotational speed and temperature range.  With manual transmissions, most manufacturers recommend that your fluid is changed every 30,000 to 60,000 miles, and under heavy-duty use every 15,000 miles.  For automatic transmissions, the typical service interval is 60,000 to 100,000 miles, however changing it more often does no harm. For CVTs (Continuously Variable Transmissions), they require a special fluid and can vary in change schedules. Check your owner’s manual for the most accurate mileage ranges.

Not changing your transmission fluid can lead to your transmission being lubricated with metal shavings and other contaminants, thus shortening the transmission’s lifespan. Changing your transmission fluid at the correct intervals is a good investment.  Stop by our shop today and our professional mechanics can get you in and out quick with fresh transmission fluid for your vehicle!