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The Toyota SC300 is a beloved vehicle among car enthusiasts, especially those who appreciate the performance capabilities of the 2JZ engine. However, to harness the full potential of 500+ horsepower, upgrading the transmission is essential. This article will guide you through the necessary steps to upgrade the SC300 transmission to handle the increased power levels.
Understanding the SC300 Transmission
The SC300 comes equipped with a W58 manual transmission or an A340E automatic transmission. While both options are reliable, they may struggle to cope with the demands of a heavily modified 2JZ engine producing over 500 horsepower.
Choosing the Right Transmission Upgrade
When upgrading the SC300 transmission, there are several options to consider. Each option has its advantages and disadvantages, depending on your driving style and performance goals.
- W58 Manual Transmission: This transmission can be upgraded with stronger components such as a heavy-duty clutch and upgraded synchros.
- A340E Automatic Transmission: This option can be enhanced with a shift kit and upgraded torque converter to handle higher power levels.
- Getrag 6-Speed Transmission: A popular swap for those seeking maximum performance, offering better gear ratios and durability.
Upgrading the W58 Manual Transmission
If you choose to stick with the W58 manual transmission, several upgrades can help it withstand the increased power:
- Heavy-Duty Clutch: A high-performance clutch kit is crucial for transferring power effectively without slipping.
- Upgraded Synchros: These components can improve shifting performance and longevity under high-stress conditions.
- Short Shifter: A short shifter can enhance shift speed and precision, making the driving experience more enjoyable.
Enhancing the A340E Automatic Transmission
The A340E automatic transmission can be upgraded to handle the increased power levels of a modified 2JZ engine. Here are some enhancements to consider:
- Shift Kit: Installing a shift kit can improve shift firmness and response, providing a more engaging driving experience.
- Upgraded Torque Converter: A higher stall torque converter can help maximize power delivery during acceleration.
- Transmission Cooler: Adding a transmission cooler can help maintain optimal operating temperatures, prolonging the life of the transmission.
Considering the Getrag 6-Speed Transmission Swap
For those looking for a more robust solution, swapping to a Getrag 6-speed transmission may be the best option. This transmission is known for its strength and ability to handle high horsepower levels. Here’s what you need to know:
- Compatibility: Ensure that you have the necessary adapters and mounts for a proper fit in the SC300.
- ECU Tuning: The ECU may require tuning to work seamlessly with the new transmission.
- Drivetrain Adjustments: You may need to modify the driveshaft and rear differential to accommodate the new transmission setup.
Final Considerations
Upgrading the SC300 transmission for 500+ horsepower levels is a significant undertaking that requires careful planning and consideration. Whether you choose to upgrade the existing transmission or swap it for a more robust option, ensure that all components are compatible and can handle the increased power.
Always consult with professionals or experienced builders to ensure that your modifications are safe and effective. With the right upgrades, your SC300 can become a high-performance machine capable of handling the power of the legendary 2JZ engine.