Auto Repair & Mechanics
San Antonio, TX
Kosub Transmission is a family-owned automatic transmission specialist serving San Antonio since 1996, founded by Gerald and Donna Kosub and now including their son Nathan. They specialize exclusively in automatic transmission rebuilding, replacement, and maintenance for domestic vehicles including Ford, Chevrolet, GMC, Dodge, RAM, Lincoln, Cadillac, and Jeep. With over a century of combined technician expertise and certifications through ATSG and ATRA, they use advanced diagnostics and never install used transmissions, ensuring factory-level performance backed by Jasper Engines & Transmissions warranty.
Ideal for: Domestic vehicle owners needing transmission rebuilds or replacement, drivers with transmission fluid and filter maintenance needs, customers seeking honest, transparent service from certified specialists
Service area: San Antonio and surrounding counties including Bexar, Atascosa, Comal, Guadalupe, and Wilson County
Exclusive Transmission Expertise: Specializes exclusively in automatic transmission rebuilding and replacement, not general auto repair. Never installs used transmissions — all work uses new components to factory standards.
Family-Owned Since 1996: Three decades of experience under the same family leadership, with certified technicians bringing over 100 years of combined knowledge and memberships in ATSG, ATRA, and Jasper Engines & Transmissions.
Advanced Diagnostics & Transparency: Uses advanced diagnostic tools to accurately identify issues and explain recommendations clearly, building trust through honest communication about what your vehicle needs.
Address: 7455 US Hwy 87 E, San Antonio, TX 78263
Phone: (210) 648-4991
Website: kosubtransmissionsvc.com
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