Transmission fluid is an essential lubricant that cools and protects the moving components in an automotive transmission. This lubricant also enables the gears to shift properly. Vehicle fluids tend to degrade over time – transmission fluid is no exception. The deterioration of transmission fluid can be accelerated in the case of a car that does a lot of city driving, or a truck that does regular hauling. Flushing the transmission clears out degraded transmission fluid so it can be replaced with new transmission fluid.
In addition to clearing out old fluid, a transmission flush washes away tiny particles, such as clutch material and metal shavings, which accumulate in the fluid over time. When transmission flush service is neglected, those particles clog passages and wedge between moving parts, causing wear within the transmission. Regular transmission service allows your transmission to function properly significantly longer, which means you’re less likely to breakdown and be faced with a major transmission repair.
Transmission service is typically recommended every 50,000 miles. As with all auto services, it is important to refer to your owner’s manual to see the recommendations for your specific vehicle.