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The Nissan 240SX is a beloved platform for car enthusiasts, particularly those interested in engine swaps. One of the most popular swaps is the Toyota 2JZ, known for its performance potential and reliability. However, to maximize the capabilities of this powerhouse engine, selecting the right gearbox is crucial. In this article, we will explore the best gearboxes for 2JZ swaps in 240SXs, ensuring you have all the information you need to make an informed decision.
Understanding the 2JZ Engine
The Toyota 2JZ engine, particularly the 2JZ-GTE variant, is famed for its robust design and tunability. It was originally designed for the Toyota Supra, and its performance has made it a favorite among tuners. The engine features a strong iron block, aluminum DOHC cylinder head, and a sequential twin-turbo setup, which contributes to its impressive horsepower and torque figures.
Why Upgrade the Transmission?
When swapping a 2JZ into a 240SX, the stock transmission may not be able to handle the increased power and torque. Upgrading the transmission can lead to better performance, improved reliability, and a more enjoyable driving experience. Here are some reasons to consider an upgrade:
- Increased torque capacity
- Improved gear ratios for performance
- Better shifting feel and response
- Enhanced durability and reliability
Top Gearbox Options for 2JZ Swaps
There are several gearbox options that can be used for 2JZ swaps in 240SXs. Each has its unique advantages, and the choice will depend on your specific needs and driving style. Here are some of the best options:
1. Toyota Getrag V160
The Getrag V160 is the factory transmission used in the MK4 Toyota Supra with the 2JZ-GTE engine. It is known for its strength and ability to handle high horsepower levels. With a six-speed design, it offers a good balance of performance and drivability.
2. Nissan 350Z 6-Speed (CD009)
The Nissan 350Z’s CD009 transmission is another popular choice for 2JZ swaps. It is a six-speed manual transmission that provides a smooth shifting experience and is capable of handling significant power. Its compatibility with the 240SX makes it a great option.
3. Tremec T56
The Tremec T56 is a legendary transmission known for its strength and versatility. It is commonly used in high-performance applications and can handle substantial horsepower. With a six-speed configuration, it allows for optimal performance on both the street and the track.
4. Nissan SR20DET 5-Speed
For those looking for a more budget-friendly option, the Nissan SR20DET 5-speed transmission can be used with a 2JZ. While it may not handle as much power as some of the other options, it is a viable choice for lower horsepower builds and can provide a decent driving experience.
Considerations for Choosing a Gearbox
When selecting a gearbox for your 2JZ swap, there are several factors to consider:
- Power handling capabilities
- Gear ratios and their suitability for your driving style
- Weight and packaging constraints
- Availability of parts and support
Installation Tips
Installing a new transmission in a 240SX with a 2JZ swap can be a challenging task. Here are some tips to help you through the process:
- Ensure you have the correct mounts for the transmission.
- Consider using a custom driveshaft to fit your new setup.
- Check for any necessary modifications to the transmission tunnel.
- Don’t forget to upgrade your clutch and flywheel for optimal performance.
Conclusion
Upgrading the transmission is a vital step in maximizing the performance of a 2JZ swap in a 240SX. With options like the Getrag V160, Nissan 350Z CD009, Tremec T56, and Nissan SR20DET 5-speed, there is a gearbox to suit various needs and budgets. By considering factors such as power handling, gear ratios, and installation challenges, you can make an informed decision that will enhance your driving experience.