Brake Repair
Clutch Repair
Commercial Truck Inspection
Diesel Repair
About Us
Automotive Brake & Clutch: San Antonio’s Technical Specialists Since 1985
Automotive Brake & Clutch (ABC Dynamics) is a locally owned institution with a 40-year legacy of technical excellence. Operating from our strategic facility in Kirby, Texas, we bridge the gap between high-precision machine shop roots and modern heavy-duty commercial fleet repair. We are San Antonio’s trusted authority for diesel diagnostics, clutch rebuilding, and Federal FMCSA compliance.
The Duffek Legacy: 40 Years of Specialization
Founded in 1985 as Industrial Brake & Clutch by Johnny Duffek, Jr. and Johnny Schultz, we began as a specialized machine shop relining brake shoes and rebuilding clutches for the San Antonio industrial sector.
Today, Scott Duffek leads the company with over 30 years of hands-on expertise. Under his leadership, we have evolved into a full-service NAPA Truck Service Center, combining our deep mechanical heritage with state-of-the-art Cummins Insite and J-Pro diagnostics.
Our Technical Credentials
- ✅ Texas DPS Certified Inspection Station
- ✅ NAPA TruckCare Authorized Facility
- ✅ EPA Section 609 Certified (Climate Control)
- ✅ CARFAX® Verified Service Shop
- ✅ ASE Master Certified Technicians
A Dual-Focus Mission: San Antonio Service & National Parts Supply
We leverage our history as parts rebuilders to provide a level of expertise general repair shops cannot match. Our mission is divided into two specialized divisions:
1. Heavy-Duty Fleet Service
Specialized diesel engine repair, air brake overhauls (S-cam/ABS), and FMCSA inspections designed to minimize downtime for San Antonio commercial operators.
2. Specialized Drivetrain Hydraulics
San Antonio’s top destination for complex Hydromax boosters, master cylinders, and heavy truck clutch replacement with flywheel resurfacing or replacement.
3. National E-Commerce Supply
We supply hard-to-find hydraulic brake and clutch components across the United States, utilizing our 40 years of inventory knowledge to support the automotive and industrial sectors.
Located in Kirby, Texas, we are proud to employ 13 local residents and remain committed to customer satisfaction and ethical repair.
