Kosub Transmission

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.