727 TorqueFlite
The 727 TorqueFlite transmission, also known simply as the TorqueFlite 727, is one of Chrysler’s most iconic and durable automatic transmissions. Introduced in 1956, this three-speed automatic was designed to succeed the two-speed PowerFlite, marking a significant advancement in Chrysler’s transmission technology. Over the decades, the 727 TorqueFlite has earned a legendary reputation for its strength, reliability, and versatility, making it a favorite among automotive enthusiasts, racers, and manufacturers.
Despite the introduction of newer transmission models, the core design of the 727 remained influential, serving as the foundation for many Chrysler transmissions through 2007. Its robustness made it particularly popular in drag racing and off-road applications, where dependable performance under extreme conditions is crucial.
Gear Ratios of the 727 TorqueFlite
One of the key factors contributing to the 727 TorqueFlite’s performance is its gear ratios. The transmission features a three-speed design with the following standard gear ratios:
1st Gear: 2.45:1
2nd Gear: 1.45:1
3rd Gear (Direct Drive): 1.00:1
Reverse: 2.21:1
These gear ratios provide a balanced combination of strong initial acceleration and efficient cruising capabilities. The 2.45:1 first gear ratio ensures robust off-the-line performance, which is particularly beneficial in drag racing and heavy towing scenarios. The 1.45:1 second gear offers smooth mid-range acceleration, while the direct drive third gear (1.00:1) delivers efficient power transfer at highway speeds.
Disclaimer:
The information provided in this content is for general consideration and guidance. It is essential to confirm the compatibility of the parts listed with your vehicle’s make, model, and year, as well as your specific performance expectations, directly with the supplier, TCS. Prices listed are accurate as of January 2025. For the most updated pricing and availability, please visit the relevant product category link in the menu on the TCS website or call customer service 1-800-960-1177.
Key Features
Several features made the 727 TorqueFlite a standout in the world of automatic transmissions:
Durability: Known for its robustness, the 727 could handle high torque and horsepower, making it a favorite for muscle cars and racing applications. Performance upgrades like the TF727 High Torque Input Shaft & Hub ($830.00 USD) ensure this transmission continues to excel in high-power builds.
Three-Speed Design: The transmission featured three forward gears, offering a balance of performance and efficiency for a wide range of vehicles.
Planetary Gear System: The planetary gear system in the 727 provided smooth shifting and exceptional load-bearing capabilities. Upgrades like the TF727 Sportsman Planetary Assembly (1975 & Older, $1,015.00 USD; 1976-93, $1,015.00 USD) enhance performance for specific applications.
Torque Converter: The TorqueFlite employed a torque converter with a lock-up mechanism in later models, improving fuel efficiency and reducing heat buildup.
Versatility: Adaptable for various vehicles, the 727 TorqueFlite could be found in everything from Chrysler, Dodge, and Plymouth cars to industrial and marine applications. Replacement parts like the 727 Output Shaft 1966-90 ($895.00 USD) ensure it remains relevant for multiple setups.
Applications
The 727 TorqueFlite found its way into many iconic vehicles over its production run:
Muscle Cars: The 727 was the transmission of choice for powerful Mopar muscle cars like the Dodge Charger, Plymouth Road Runner, and Chrysler 300. Its ability to handle high horsepower made it a staple in drag racing. Performance parts such as the TF727 Full Metal Jacket Drum Kit ($950.00 USD) or the TF727 Ultra-Light Sun Shell ($180.00 USD) provide racers with enhanced durability and reduced weight for competitive edge.
Trucks and SUVs: Its rugged design made it a reliable option for Dodge and Chrysler trucks, as well as utility vehicles.
Racing: In the drag racing world, the transmission’s ability to handle massive power levels, coupled with quick and reliable shifts, has made it a favorite in hot-rodding circles. Upgrades like the TF727 16 Element Bolt-In Sprag Kit ($255.00 USD) ensure that the transmission can handle the rigors of high-performance applications.
Performance and Aftermarket Appeal
The 727 TorqueFlite remains popular among car enthusiasts and restorers due to its performance potential and ease of customization. Numerous aftermarket products provide opportunities for builders to enhance this transmission’s capabilities:
- The TF727, A518, A618, 47RE, 48RE Steel Front Drum & X-Large Piston ($795.00 USD) is a premium upgrade for heavy-duty use.
- The TF727 Rear Drum Aluminum Pressure Plate ($53.70 USD) is ideal for lightweight builds.
- Advanced components like the TF727 Sportsman Support Kit ($495.00 USD) and TF727 A518 Low Reverse Spring Retainer ($35.00 USD) cater to specific high-performance needs.
Additionally, for those who prioritize maintenance and optimization, the Torqueflite Stick Shift 3-Spd 66-ON TRANSGO Reprogramming Kit ($186.00 USD) offers a way to modify and enhance the shift characteristics of the transmission.
Legacy
While Chrysler eventually replaced the 727 with newer transmission designs, its impact on the automotive industry is undeniable. Enthusiasts today continue to restore and upgrade the TorqueFlite with modern performance parts to meet their specific needs. High-quality aftermarket options like the TF727 Weight Loss Kit ($1,195.00 USD) and TF727, A518, A618, 47RE, 48RE ProTrans ProFlight Dual Ring Kick-Down Servo Assembly ($112.00 USD) allow builders to push this iconic transmission to new limits.
The 727 TorqueFlite is more than just a transmission; it represents a legacy of innovation and engineering excellence that has stood the test of time. Whether you’re restoring a classic or building a high-performance racer, the 727 TorqueFlite remains a trusted choice with unmatched aftermarket support.