As the temperature of automatic transmission fluid rises, the chemical components start to break down. Over time, the lubricating properties of the fluid are diminished. If not replenished, transmission bearings and bushings begin to wear. If the bushings and bearings wear out, they can cause internal leaks which cause pressure losses, which lead to clutch, band and gear train failure. The automatic transmission fluid and filter must be replaced regularly to prevent the break down of automatic transmission fluid integrity and to prevent premature failure of automatic transmission internal components.

In addition to automatic transmisison fluid losing integrity, all automatic transmissions use rubber or paper gaskets and seals which shrink and become brittle when subjected to heat generated by the transmission. As this occurs, leaks develop. If these leaks are allowed to go unchecked, low fluid level will result. This will cause damage to internal transmission components. It is important to have a certified transmission technician regularly replace the transmission pan gasket and to check your vehicle for external transmission leaks.