In our opinion, this manual Allison Transmissions 1000 and 2000 Product Families 4th Generation Controls Troubleshooting Manual (Pub no. TS3977EN) WORKSHOP SERVICE REPAIR MANUAL it serves as an invaluable resource not only for technicians and mechanics but also for enthusiasts eager to delve into the world of repairs. Moreover, it comes at an exceptionally competitive price point, offering tremendous value for the wealth of information it provides, ensuring affordability without compromising quality. Its comprehensive nature caters to individuals seeking to learn, develop, and excel within this field, making it an ideal choice for anyone passionate about honing their skills or broadening their knowledge base. This manual provides troubleshooting information for Allison Transmission 1000 and 2000 Product Families transmissions. Service Manual SM4006EN, Mechanics Tips MT4007EN, and Parts Catalog PC3062EN may be used in conjunction with this manual. This manual includes: Description of the electronic control system; Description of the electronic control system components; Description of diagnostic codes, system responses to faults, and troubleshooting; Wire, terminal, and connector repair information.