This manual provides comprehensive service, repair, and maintenance information for the Triumph TR3A and TR3B models produced between 1953 and 1961. These iconic British sports cars are celebrated for their agile handling, spirited performance, and distinctive styling. The TR3A, introduced in 1955, evolved from the TR2/TR3, offering enhanced features and performance. The TR3B, launched in 1959, primarily featured a larger engine for the US market, continuing the legacy of accessible sports car motoring. Both models represent a significant era in automotive history, known for their robust engineering and engaging driving experience.

This factory-style service and repair manual is designed to empower owners, mechanics, and technicians with the knowledge required to maintain and repair these classic vehicles. It covers a wide array of systems, including engine mechanicals, fuel and ignition systems, transmission, drivetrain, suspension, steering, brakes, and the electrical system. Detailed procedures for routine maintenance, component overhaul, adjustments, and troubleshooting are provided, along with essential technical specifications, torque values, and wiring diagrams. This resource aims to ensure the longevity, originality, and optimal performance of your Triumph TR3A or TR3B.