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 premier NAPA Truck Service Center, combining our deep mechanical heritage with state-of-the-art Cummins Insite, Allison Doc, and J-Pro diagnostics.
Verified Authority & Credentials
- ✅ Official Texas DOT Inspection Station
- ✅ NAPA Truck Service Center (National Warranty)
- ✅ ASE Master Certified Technicians
- ✅ EPA Section 608/609 Certified (Climate Control)
- ✅ CARFAX® Verified Service History Shop
- ✅ Bexar County Commercial Inspection Facility
A Dual-Focus Mission: San Antonio Service & National Parts Supply
1. Heavy-Duty Fleet Service
Specialized diesel engine repair, air brake overhauls (S-cam/ABS), and Federal FMCSA inspections designed to maximize uptime for Texas commercial fleets.
2. Specialized Drivetrain Hydraulics
The region’s top destination for Hydromax boosters, 1-inch bore master cylinders, and heavy truck clutch replacement featuring precision flywheel resurfacing.
3. National E-Commerce Supply
Supporting the automotive and industrial sectors across the U.S. with hard-to-find hydraulic components, leveraging 40 years of inventory expertise.
Trusted by local fleets. Respected by national builders. Rooted in Kirby, Texas.
