This manual covers the Triumph TR3A and TR3B models, produced between 1955 and 1962. These classic British sports cars are renowned for their robust engineering, engaging driving experience, and iconic styling. The TR3A, a refinement of its predecessor, featured a 1991 cc inline 4-cylinder engine producing approximately 100 bhp, while the rarer TR3B introduced a larger 2138 cc engine, offering enhanced performance. Both models are characterized by their body-on-frame construction, front disc and rear drum brakes, and a 4-speed manual transmission, with an optional overdrive. Their motorsport heritage, including participation in events like Le Mans, underscores their performance capabilities.

This comprehensive factory service repair manual is designed to provide detailed guidance for the maintenance, repair, and restoration of the Triumph TR3A and TR3B. It covers all essential systems, including the engine, transmission, brakes, suspension, steering, and electrical systems. Within its pages, you will find routine maintenance procedures, troubleshooting guides for common issues such as oil leaks and overheating, and in-depth instructions for major component overhauls and rebuilds. The manual also includes critical technical specifications, torque values, fluid requirements, and detailed wiring diagrams, making it an indispensable resource for enthusiasts, professional mechanics, and restoration specialists.