Collection: Transmission Oils for Harley-Davidson, Indian, and Metric Motorcycles

The gears of the transmission rub against each other with every shift – and only the right oil keeps them intact for hundreds of miles. The purpose of transmission oil is to reduce friction and wear between gears, bearings, and other moving parts, while dissipating heat and keeping the system clean from metal particles and deposits. Many Harley-Davidson motorcycles have a separate oil circuit for the transmission from the engine, so choosing the correct viscosity and type of oil is crucial for smooth, precise shifting and long-term reliability. In our selection, you will find transmission oils for Harley-Davidson, Indian, and metric custom motorcycles, in various viscosities and compositions – mineral, semi-synthetic, and fully synthetic versions alike. Oils conforming to factory specifications are available, as well as high-performance formulas offering enhanced wear protection, recommended for engines with increased load capacity and improved performance. Quality transmission oil ensures stable lubrication, long lifespan, and smooth, precise shifting, whether it's for everyday city riding or long, hot summer tours. Whether the replacement is part of a regular oil change or a complete transmission overhaul, you will find the transmission oil that provides exactly the protection your motorcycle's transmission needs.