What Is a Transmission Fluid Service?
A transmission fluid service is one of the most important preventative maintenance items you can do for your vehicle. Over time, transmission fluid breaks down from heat and friction, losing its ability to lubricate and cool the hundreds of moving parts inside your transmission. Degraded fluid can cause rough or delayed shifts, shuddering, overheating, and — left unchecked — expensive internal damage.
At Riley Auto Care & Transmissions, a full transmission fluid service includes draining the old fluid, replacing the transmission filter, inspecting and resealing the pan gasket, and refilling with fresh, manufacturer-specified fluid. We offer AMSOIL synthetic transmission fluids for customers who want maximum protection and longer service intervals.
What's Included in Our Transmission Fluid Service
Transmission Fluid Drain & Refill
We drain the old, degraded fluid and refill with fresh fluid matched to your vehicle's manufacturer specification — including AMSOIL synthetic options.
Transmission Filter Replacement
The filter traps metal particles and debris. A clogged filter restricts fluid flow and accelerates wear. We replace it as part of every full service.
Pan Gasket Inspection & Resealing
We remove the transmission pan, inspect it for debris or metal shavings (an early warning sign of internal wear), and install a fresh gasket to prevent leaks.
Fluid Condition & Level Check
After the service, we verify the correct fluid level and check for any signs of leaks or abnormal fluid color that may indicate a deeper issue.
Signs Your Transmission Fluid Needs Service
Most manufacturers recommend a transmission fluid service every 30,000–60,000 miles, but driving conditions, towing, and stop-and-go traffic can shorten that interval. Watch for these warning signs:
- Rough, jerky, or delayed gear shifts
- Transmission shudder or vibration
- Slipping out of gear while driving
- Dark brown or burnt-smelling fluid
- Transmission warning light on dash
- Hesitation when shifting from Park
- Unusual whining or humming noise
- Fluid leak under the vehicle
Why We Recommend AMSOIL Transmission Fluid
Riley Auto Care & Transmissions is an authorized AMSOIL dealer. AMSOIL synthetic transmission fluids are engineered to outperform conventional fluids in heat resistance, shear stability, and oxidation protection — all critical factors for transmission longevity.
AMSOIL fluids are available for automatic transmissions, CVTs, dual-clutch units, and manual gearboxes. Ask our service team whether an AMSOIL upgrade is right for your vehicle and driving habits.
Schedule Your Transmission Fluid Service — San Marcos, TX
Serving San Marcos, Kyle, Buda, Seguin, New Braunfels, and the surrounding Central Texas region. Our shop at 1334 TX-123 is easy to reach from I-35. Family owned and operated since 1978.
Don't wait until a small fluid issue becomes a costly repair. Book your transmission fluid service online or give us a call — we'll get you in quickly.