1957 Pontiac Hydra-Matic Service Manual

Pontiac Motor Division service manual for the 1957 Strato-Flight Hydra-Matic transmission, a four-speed automatic with a fluid coupling in place of a clutch. It starts with driver operation and the principles of the planetary gear train, sprag clutches and hydraulic controls, then moves through adjustment, removal, overhaul, assembly, installation, testing and diagnosis. Specifications, a 1956 appendix and an index close the book. This scan repeats several pages and omits the book's pages on disassembly of individual units.