Cusco (Non) LSD Type RS 2way Rear Mazda RX-7 FC3S/FD3S

This is the Cusco Type RS 2-way limited slip differential (LSD) for the rear of your Mazda RX-7 FC3S and FD3S. If you're looking to improve traction and handling, especially during spirited driving or track use, an LSD is a significant upgrade. It works by distributing torque between the rear wheels, ensuring that power is sent to the wheel with the most grip. This helps prevent wheel spin during cornering and acceleration, leading to a more stable and predictable feel.

The Type RS is a popular choice because it offers a good balance between performance and daily drivability. Its 2-way design means it engages during both acceleration and deceleration. This provides consistent control and stability when you're on the throttle and also helps to stabilize the rear end when you lift off, which can be particularly beneficial in a rear-wheel-drive car like the RX-7. Cusco is well-known for its well-built drivetrain components, and this LSD is no exception. It's constructed with durable materials designed to handle the stresses of performance driving. Installation typically involves removing the rear differential housing, disassembling the stock differential, and installing the new LSD unit. It's a job that requires specific tools and a good understanding of drivetrain components, so many people opt to have a professional mechanic handle it.

When installing this differential, it's important to use the correct differential fluid as recommended by Cusco to ensure proper break-in and long-term performance. You'll also want to ensure your rear axle seals and bearings are in good condition, as this is a good opportunity to address any wear items while the differential is out. This LSD is designed to be a direct replacement for your factory differential, making the swap as straightforward as possible, assuming all supporting components are in good order.