San Antonio lead technical advisor Scott Duffek performing Hydromax diagnostics

San Antonio’s Authority for Auto, Heavy-Duty Truck, & Fleet Repair

Automotive Brake & Clutch: San Antonio’s trusted specialist for Diesel, Brakes, and Drivetrain Hydraulics since 1985. Led by Scott Duffek, a Texas DPS Certified Inspector with 30+ years of expertise.

Specialized Technical Solutions

Expert mechanical repair for San Antonio commuters and commercial fleets.

Clutch & Drivetrain

Specializing in heavy-duty semi-truck clutch replacement and flywheel resurfacing. We manage complex hydraulic failures.

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Diesel & Fleet Compliance

San Antonio’s Official Texas DOT Station. Advanced diesel diagnostics for Cummins, Power Stroke, and Duramax.

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Brake System Specialists

Authoritative service for Hydromax, Hydroboost, and air brake overhauls. Solving “hard pedal” issues for Class 5-8 trucks.

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Engineered for Performance

We utilize technical diagrams and OEM software (Cummins Insite, J-Pro) for precision in every repair.

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Verified Records: We Report to CARFAX®

Protect your resale value. Every service is reported to CARFAX®, providing a verified digital service history for your personal or commercial business records.

Shop Specialized Parts Nationwide

From Hydromax boosters to specialized master cylinders, we ship hard-to-find drivetrain hydraulics across the United States.

Brake Master Cylinders
Brake Master Cylinders

73 Products

Hydromax Brake Boosters
Hydromax Brake Boosters

18 Products

Clutch Slave Cylinders
Clutch Slave Cylinders

12 Products

Wheel Cylinders
Wheel Cylinders

5 Products

Master Cylinders for Hydromax
Master Cylinders for Hydromax

25 Products

Clutch Master Cylinders
Clutch Master Cylinders

12 Products

Truck Flywheels - Medium Duty & Semi Truck
Truck Flywheels - Medium Duty & Semi Truck

24 Products

Medium Duty Truck Brake Calipers
Medium Duty Truck Brake Calipers

5 Products

Brake Master Cylinder Repair Kits
Brake Master Cylinder Repair Kits

36 Products

Parking Brake Shoes for Medium Duty Trucks
Parking Brake Shoes for Medium Duty Trucks

5 Products

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.