If you've ever wanted to know what lies inside the confines of the GM2004R transmission case ,this manual is for you. With this manual, some hand tool knowledge and common sense you can rebuild ,repair and modify the unit with great confidence and precision.This is the most complete source of GM2004R transmission information available anywhere. This manual consists of 200 pages. Step by step disassembly,inspection and reassembly of the entire transmission with photographs and text for each task.In depth information on all of the performance modifications we perform.Principles of operation.Clutch ,band and servo selection.Updated steel billet parts.Parts interchange.Valve body and governor tech.Converter theory,tech and selection.Hydraulic tables.Troubleshooting.Lots of photos of the 2004r being pushed to the limit in customers cars.This manual is $129.99 and can be shipped anywhere in the continental U.S.A. It can be ordered via email or phoning in to our New York office.