OS Giken 72-88 Porsche 915/930 MT Various Super Lock LSD 28/25-456-12-10S COARSE Spline

OS Giken is well-known for making high-performance drivetrain components, and their Super Lock Limited Slip Differential (LSD) is a prime example of that expertise. If you're driving a 1978 or 1979 Porsche 930, this LSD is designed to significantly improve how your car puts power down, especially when you're accelerating out of corners or dealing with slippery conditions. It works by actively managing the difference in speed between your rear wheels, ensuring both receive torque even when one starts to lose grip. This results in a more stable and predictable feel under acceleration, making your classic Porsche more engaging and capable.

This particular Super Lock LSD features a 28/25-456-12-10S configuration with coarse spline engagement, specifically tailored for the 915 and 930 transmissions found in these models. The Super Lock design is a unique approach that offers a very high initial lock-up percentage, which can be further adjusted by changing the preload settings. This means you can fine-tune the differential's behavior to match your driving style and the demands of the road or track. The robust construction means it's built to handle the stresses of spirited driving, providing a solid and reliable upgrade for your drivetrain.

When installing this LSD, it's important to note that it's designed as a direct replacement for the factory differential, but it requires professional installation due to the precision involved in setting gear backlash and preload. You'll want to ensure you have the correct tools and follow the manufacturer's detailed installation instructions carefully to get the most out of its performance capabilities. This upgrade is a substantial change that can really transform the driving experience of your Porsche 930.