Transmission Fluid Service in San Marcos, TX

About This Service

Fluid flush, filter change, and pan gasket service. AMSOIL transmission fluids available for smooth, shudder-free shifts and extended transmission life.

Automatic transmission fluid degrades from heat, oxidation, and friction material shed by clutch packs. As it breaks down, shift quality deteriorates and internal components wear faster. A transmission service drains the old fluid, replaces the filter, installs a new pan gasket, and refills with fresh fluid — restoring proper hydraulic pressure and smooth shifting. We stock AMSOIL transmission fluids for applications requiring premium synthetic ATF.

• Drain, filter replacement, and pan gasket service
• AMSOIL synthetic ATF available for all applications
• Restores proper hydraulic pressure and shift quality
• Recommended at manufacturer-specified mileage intervals

At Riley Auto Care & Transmissions, we've been serving drivers in San Marcos and throughout Central Texas since 1978. Our certified technicians use the latest diagnostic equipment and quality parts to get your vehicle back on the road right the first time.

We'll give you an honest assessment and a clear written estimate before any work begins. No surprises — just straightforward service you can trust.