Heavy-duty commercial truck fleet repair facility
Founded 1985 • San Antonio, Texas

Expert Medium-Duty Brake & Drivetrain Authority

Driven by decades of master-level expertise in medium-duty hydraulics and diesel compliance. San Antonio’s premier facility for commercial fleets and vocational vehicles.

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Texas DPS Certified
Official Vehicle Inspection Station
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EPA Certified 608/609
Mobile A/C & Refrigeration Experts
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NAPA TruckCare Center
Nationwide Peace of Mind Warranty
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CARFAX® Partner
Verified Service History Reporting

San Antonio Fleet & Diesel Services

Dedicated to solving complex mechanical failures where other shops stop. We specialize in Class 5-8 truck systems and high-precision drivetrain diagnostics.

Hydro-Max & Brake Service

Expert troubleshooting for Hydro-Max boosters, master cylinders, and air brake systems. We solve the “hard pedal” and low-flow issues common in medium-duty trucks.

Technical Brake Info →

Heavy-Duty Clutch & Flywheel

Specialized semi-truck clutch replacements and in-house flywheel resurfacing. Precision balancing ensures long-term drivetrain reliability for commercial fleets.

Drivetrain Services →

Diesel Repair & DOT Compliance

Comprehensive diesel diagnostics for Cummins, Power Stroke, and Duramax. We are a certified Texas DOT Inspection station for all vocational vehicles.

Diesel Compliance →

Why San Antonio Fleet Managers Choose Us

Since 1985, Automotive Brake & Clutch has stood as a pillar of the San Antonio automotive community. Our master technicians leverage decades of hands-on field experience to provide diagnostic accuracy that generalist shops simply can’t match.

We don’t just “swap parts”—we utilize OEM software (Cummins Insite, J-Pro) and specialized hydraulic testing to verify failures before you spend a dime on repairs, keeping your fleet on the road and your downtime to a minimum.

Service Highlights:

  • ✔️ Verified CARFAX® Service Reporting
  • ✔️ Official Texas Vehicle Inspection Station
  • ✔️ Specialized Hydraulic Press Work
  • ✔️ Medium-Duty Driveline Balancing
  • ✔️ Expert Fleet Maintenance Scheduling

Hard-To-Find Parts, Shipped Nationwide

Searching for specialized Bexar Pro Components or rare Hydro-Max reservoirs? We inventory the technical parts that keep American fleets moving.

VISIT THE ONLINE SHOP

Expert Repair FAQ: San Antonio Authority

Does Texas require DOT inspections in 2026?

Yes. While safety inspections were removed for passenger cars, annual safety inspections remain mandatory for all commercial motor vehicles (CMV) over 10,001 lbs. Automotive Brake & Clutch is an official station for these inspections in San Antonio.

What is a Hydromax brake booster failure?

Common Hydromax booster failures include internal seal leaks, a failing backup electric motor, or flow switches that stick. We provide precision diagnostic estimates to ensure your truck’s stopping power is restored.