This comprehensive service and repair manual provides in-depth information for the 4L60, 4L60-E, and 4L30-E 4-speed longitudinal automatic transmissions. It covers a wide range of vehicles, including popular models from Buick, Cadillac, Chevrolet, GMC, Holden, Hummer, Oldsmobile, Pontiac, Saab, Acura, BMW, Honda, Isuzu and Opel.

The manual delves into various aspects of transmission repair, starting with an introduction to the transmission's components and functions. It then guides you through the disassembly and assembly process, providing detailed instructions for each step. Troubleshooting tips and common issues are also addressed, along with a section dedicated to understanding and interpreting trouble codes.

Detailed diagrams and technical descriptions cover critical areas like the torque converter, lubrication points, seal locations, and the intricate workings of the valve body and clutch assemblies. You'll find a dedicated section for upgrading pistons and a comprehensive solenoid resistance chart, aiding in proper diagnosis and repair.

The manual further equips you with an understanding of shift speed charts, line pressure calculations, and check ball locations. Wiring schematics and hydraulic schematics offer visual representations of the transmission's internal workings. A dedicated section on case preparation provides essential guidelines for proper maintenance and refurbishment. This manual is an indispensable resource for mechanics, enthusiasts, and anyone seeking a thorough understanding of the 4L60, 4L60-E, and 4L30-E automatic transmissions.

The VN VR VS VT VX VY 4L60E 4L30E Auto Gearbox Repair Manual is a comprehensive guide designed to assist individuals in repairing and maintaining the popular 4L60E and 4L30E automatic transmissions found in a wide array of vehicles. These transmissions, manufactured by General Motors, were renowned for their durability and reliability, powering numerous passenger cars and light trucks across various brands. The manual covers a broad spectrum of models encompassing Buick, Cadillac, Chevrolet, GMC, Holden, Hummer, Oldsmobile, Pontiac, Saab, Acura, BMW, Honda, Isuzu, and Opel, ensuring its applicability to a vast audience.

Beyond the scope of GM vehicles, the manual's focus on the 4L60E and 4L30E transmissions extends its relevance to other manufacturers who incorporated these transmissions in their vehicles. The manual delves into the intricacies of these transmissions, providing detailed instructions on dismantling, inspecting, and reassembling components. Its comprehensive approach encompasses troubleshooting common issues, identifying potential failure points, and offering expert advice on proper repair techniques. By equipping individuals with the necessary knowledge and practical guidance, the manual aims to empower them to confidently tackle repair tasks and restore their vehicle's transmission to optimal functionality. From basic maintenance procedures to advanced repairs, the manual serves as an invaluable resource for both novice and experienced mechanics alike.