3379137
automo/m Manual Domestic
Cummins®

The Cummins Automatic Manual Transmission for Domestic Vehicles (Part #3379137) represents a significant advancement in commercial truck operations. This transmission system is designed to enhance efficiency and comfort, playing a pivotal role in the overall performance and fuel economy of the vehicle.

Basic Concepts of Automatic Manual Transmission

Automatic Manual Transmission (AMT) combines elements of both traditional automatic and manual transmissions. Unlike a conventional automatic transmission, which uses a torque converter and planetary gearsets, an AMT employs a manual gearbox with automated shifting. This is achieved through the use of hydraulics and electronics to control the clutch and gear shifts, offering a balance between the smooth operation of an automatic transmission and the control and efficiency of a manual transmission ¹.

Purpose and Role in Truck Operation

This Cummins part is integral to the operation of a truck, enhancing driving efficiency and comfort. By automating the shifting process, it allows for smoother transitions between gears, which can lead to improved fuel economy. Additionally, the system reduces driver fatigue on long hauls by eliminating the need for constant manual shifting, thereby contributing to overall vehicle performance ².

Key Features

The 3379137 AMT incorporates several advanced technologies that contribute to its functionality and reliability. These include precise electronic control systems for gear shifting, robust hydraulic components for clutch operation, and sophisticated sensors that monitor various parameters to ensure optimal performance. These features work together to provide a transmission system that is both durable and efficient.

Benefits

The benefits of the 3379137 AMT include an improved driver experience due to the automated shifting, which reduces fatigue during long hauls. The system also offers enhanced vehicle control and potential cost savings through better fuel efficiency and lower maintenance requirements. These advantages make it a valuable component for commercial truck operations.

Troubleshooting and Maintenance

To maintain this part in optimal condition, it is important to follow recommended maintenance practices. This includes regular inspections of the hydraulic system, checking for any signs of wear or malfunction, and ensuring that all electronic components are functioning correctly. Early identification of issues can prevent more significant problems down the line, ensuring the longevity and performance of the transmission.

Integration with Cummins Engines

The 3379137 AMT is designed to integrate seamlessly with Cummins engines, offering compatibility and performance enhancements. Using Cummins components throughout a truck’s powertrain can lead to improved efficiency and reliability, as the systems are engineered to work together harmoniously.

Cummins Corporation Overview

Cummins Inc. has a long-standing history in the automotive and heavy-duty truck industries, known for its commitment to innovation and quality in manufacturing automotive components. The company’s dedication to advancing technology and maintaining high standards of production ensures that its products, like the 3379137 AMT, meet the demanding requirements of commercial truck operations.

Compatibility with Domestic Vehicle Engines

This Cummins part is designed to integrate seamlessly with a variety of domestic vehicle engines, ensuring smooth and reliable performance. This transmission is engineered to work with specific engine models, providing a robust and efficient solution for automotive applications.

NH/NT 855 Engines

The NH/NT 855 engines are part of a series known for their durability and power. This transmission is specifically tailored to fit these engines, enhancing their operational efficiency. This transmission is engineered to handle the torque and power output of the NH/NT 855 engines, ensuring that the vehicle maintains optimal performance under various driving conditions.

The compatibility of the transmission with the NH/NT 855 engines is achieved through precise engineering and rigorous testing. This ensures that the transmission can effectively manage the power delivery and shifting requirements of these engines, providing a reliable and smooth driving experience.

Integration in Domestic Vehicle Systems

When integrating this part, it is essential to understand its interaction with various engine systems. This AMT is designed to work seamlessly with the vehicle’s engine, transmission control module (TCM), and other related components to ensure smooth operation and optimal performance.

Engine and Transmission Control Module (TCM) Interaction

The AMT relies on the TCM to manage the shifting process. The TCM receives data from various sensors, including the engine control unit (ECU), throttle position sensor, and vehicle speed sensor. This data allows the TCM to determine the appropriate gear for the current driving conditions, ensuring efficient power delivery and fuel economy.

Clutch and Gearbox Coordination

This part features an automated clutch system that works in conjunction with the gearbox. The clutch engages and disengages automatically, controlled by hydraulic or electronic actuators. This system ensures smooth gear changes without the need for manual intervention, enhancing driver comfort and reducing wear on the transmission.

Driveshaft and Differential Compatibility

The AMT is designed to connect to the driveshaft, which transmits power from the transmission to the differential. The differential then distributes power to the wheels, allowing for smooth acceleration and deceleration. The AMT’s design ensures that power transfer is efficient, minimizing energy loss and maximizing vehicle performance.

Integration with Electronic Stability Control (ESC)

Modern vehicles often feature Electronic Stability Control (ESC) systems that work in tandem with the AMT. The ESC system monitors vehicle stability and traction, making adjustments to the AMT’s shifting patterns to maintain control during adverse driving conditions. This integration enhances safety and driving dynamics.

Fuel Efficiency and Emission Control

The AMT is engineered to optimize fuel efficiency by selecting the most appropriate gear for the driving conditions. This not only reduces fuel consumption but also lowers emissions. The AMT works with the engine’s fuel injection system to ensure that the air-fuel mixture is optimal for both performance and environmental compliance ³.

Sensor Feedback Loop

Various sensors provide feedback to the TCM, including the engine speed sensor, transmission speed sensor, and ambient temperature sensor. This feedback loop allows the AMT to adapt to changing conditions, ensuring consistent performance across a range of scenarios.

Maintenance and Diagnostic Systems

The AMT is equipped with diagnostic systems that communicate with the vehicle’s onboard computer. This allows for real-time monitoring of transmission health, enabling early detection of potential issues. Regular maintenance, informed by these diagnostics, ensures the longevity and reliability of the AMT system.

Conclusion

The Cummins Automatic Manual Transmission for Domestic Vehicles (Part #3379137) is a sophisticated component that enhances the efficiency, comfort, and performance of commercial trucks. Its integration with Cummins engines and compatibility with various domestic vehicle engines make it a valuable asset in the automotive industry. Regular maintenance and adherence to recommended practices ensure the longevity and optimal performance of this advanced transmission system.