Some parts in the vast theatre of automotive machinery etch their names into the iron ledger of strength and endurance. The Chrysler-built 47re transmission is one of these mainstays; it is a mechanical heart that is respected in towing fields, garages and highways alike. A late 20th-century relic that continues to have relevance today, it is much more than a straightforward gearbox; it is a complex fusion of strength, robustness, and engineering know-how.