This comprehensive collection provides detailed information for 3000 and 4000 Series automatic gearboxes across multiple generations, including WTEC II, WTEC III, and 4th Generation control systems. These transmissions are engineered for robust performance and reliability in a wide range of applications. The included service manuals, troubleshooting guides, principles of operation, technician guides, and owner manuals offer extensive coverage for various models within the 3000 and 4000 series, ensuring you have the resources necessary for optimal operation. This manual is designed to assist a broad audience, from first-time owners to professional technicians, in understanding and maintaining their transmissions. It covers essential areas such as general information, diagnosis, preventive maintenance, overhaul procedures, tools and equipment, and detailed assembly instructions. By following the guidance provided, users can ensure correct procedure execution, prevent premature failure, and ultimately save time and money on repairs, keeping their vehicles in optimal working condition.