Gear oil, also known as Transmission Fluid, is one of the most essential fluids in a vehicle’s powertrain system. Its primary role is to lubricate gears, reduce friction, prevent wear, and ensure smooth power transfer from the engine to the wheels. The correct choice and proper maintenance of transmission oil are critical to gearbox performance and durability.
Main Functions of Gear Oil
Lubrication: Coats moving gears and components to minimize friction and wear.
Cooling: Absorbs and dissipates heat generated by friction.
Protection: Prevents rust and corrosion of metal parts.
Power Transmission: In automatic transmissions, the fluid also acts hydraulically to enable smooth shifting.
Cleaning: Keeps small metal particles and deposits suspended, preventing buildup on gearbox components.
Types of Transmission Oil
Gear Oil: Used mostly in manual transmissions, known for higher viscosity.
Automatic Transmission Fluid (ATF): Designed for automatic gearboxes, offering both lubrication and hydraulic properties.
Continuously Variable Transmission Fluid (CVT Fluid): Specially formulated for CVT systems to provide seamless operation.
Dual-Clutch Transmission Fluid (DCT Fluid): Tailored for dual-clutch transmissions.
Importance of Timely Transmission Oil Change
Delayed transmission oil changes can lead to loss of lubrication quality, buildup of contaminants, and potential damage to gears, bearings, and the entire transmission system. This often results in expensive repairs.
Tip: Always use the transmission oil recommended by your vehicle manufacturer and follow the specified service intervals.