Chrysler Torqueflite A90 4 and A727 Transmissions

The Chrysler Torqueflite A90 4 and A727 Transmissions technical manual by S-A Books is an essential reference guide for mechanics, restorers, and automotive enthusiasts working on classic and vintage Chrysler vehicles. This comprehensive resource is crucial for understanding the design, operation, and maintenance of these legendary automatic transmissions, which are vital for proper diagnosis, repair, and performance tuning.

The A727 is a well-known three-speed automatic transmission recognized for its durability and reliability, engineered to handle high torque output from big-block V8 engines while delivering smooth shifts. The A90 4-speed variant offers enhanced performance with its additional gear, improving highway fuel economy. This manual covers critical topics such as valve body configurations, torque converter operation, fluid specifications, and common failure points, providing the knowledge necessary for professional-grade rebuilds.

Ideal for transmission rebuilders, mechanics, and restorers, this guide serves as a valuable tool for anyone looking to maintain or restore classic Chrysler, Dodge, and Plymouth models from the 1960s to the 1980s. Understanding the relationship between throttle pressure, governor response, and band servo engagement is essential for diagnosing shift quality issues and ensuring optimal performance.