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Our gearsets have proven their reliability across various platforms, and it's time to extend this performance to the popular 6-speed Aisin gearbox.
This kit includes everything needed to address common issues with the factory AZ6 transmission... we provide all components as they are all proprietary, some key components we include, gears, shafts, dog rings, hubs, input shaft to suit application, main shaft and propriety custom bearings we designed in some places.
The gear ratios for ultimate strength and performance are as follows:
Speedtek Auto Racing Helical Cut Gearset:
S15 SR20DET 6-Speed Ratios (also applicable to BRZ & FRS):
Reverse: 3.43
These gearsets are designed for rapid quick shifts, offering a significantly different experience from the factory Aisin AZ6 synchronized transmission.
We currently have donor transmissions from the Nissan Silvia S15 and Subaru BRZ. We can also produce gearsets for Mazda, Toyota, and other models if someone donates a transmission, as the mainshaft and input shafts differ between models.
This kit ensures your transmission can reliably withstand upto 600 BHP (measured at power to the transmission). Additionally, we have developed a race spec lockout shifter which features a unique design to stop accidental shifting into first gear going from second to third.
We estimate these kits will be completed by mid 2025
*Strictly no refunds on any Pre-Orders, please be mindful we are working at the fastest pace possible.
Our solid 6-month unconditional warranty program for all our manufactured gearsets, you can be confident that your investment is well-protected.
Our extended warranty program is available, for more information : Extended Warranty Program now Available with our Performance Transmiss – Speedtek Auto Racing
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