The OS Giken Super Lock LSD uses our patented pressure ring design that allows for smooth, progressive locking. This design is a spline-through-side-gear design that allows for fitment of more friction plates (up to 2x as many as competitors versions).
- All components are chemically heat treated for maximum durability
- All components are constructed from a high-grade steel alloy
- Gears are raw-forged for maximum strength
- Clutch disks are precision-machined simultaneously on both sides to extremely tight tolerances resulting in minimal warpage.
- LSD case is machined from a single billet piece to ensure uniformity.
- 1.5 Way LSD
The OS LSD standard spec allows for low preload while still retaining a fully progressive 100% lock capability. Operation is quiet and the progressive locking allows for smooth predictable locking. When replacing an open diff, equipping an OS LSD will completely improve the driving experience while maintaining everyday drivability.
NOTE: 2007-2008 G35 Sedan owners, please select the "370Z/G37 Stub Axle" if necessary.
Tunability
- Initial torque can be adjusted by using thicker / thinner cone springs
- Lock progression timing can be adjusted by using stiffer / weaker pressure ring springs, allowing the progression of full lock to be fine-tuned to the
- vehicle/driver
- Ramp angles can be customized by swapping the pressure ring and iron cross for even more tuning possibilities
- TCD spec disks can be installed for increased oil cooling and even smoother operation
PRESSURE RING
Our revolutionary pressure ring houses our patented lock timing system, where springs work in opposition of torque being applied to the LSD. This results in a progressive, smooth, and quiet operation of the clutch discs within the differential. Furthermore, by modifying the spring rate, the rate of which the differential reaches full lock can be adjusted to suit particular vehicle settings and racing styles.
CAM ANGLE
Unlike other manufacturers that utilize modular components, we produce our cams and pressure rings as matching sets. Because the faces of the cams are grounded exactly to match the application area of the pressure ring, torque transfer is smooth and consistent throughout the lock range.
GEARS
The unique “spline-through” side gears allows our LSD to house more clutch discs than other competitors. Also, due to the relatively large size, it provides superior durability and torque transfer.
CLUTCH DISCS
The discs are precision-machined simultaneously on both sides to extremely tight tolerances to reduce flatness deviations and to eliminate the need to perform the tedious “figure 8” break-in period. By using as much as twice as many clutch discs than competing brands, our differential provides superior torque hold, while also reducing the “clunkiness” of traditional clutch-type LSDs. This also results in enhanced durability and reduced wear as torque hold is spread out over a higher amount of friction surfaces.
CASE
The case and all components are constructed from a high-grade steel alloy, and then chemically heat treated for increased durability. The extra rigidity created ensures that the internal components stay within their tight tolerances, allowing the differential to function with watch-like precision.
This differential is now available for the Manual and Automatic 350Z, 370Z, G35, & G37. Modification of your Base Model Stub Axles required, Factory VLSD models require the purchase of an extra stub axle. Please choose the appropriate options before adding to cart.
NOTE: OS Giken Differentials require the replacement of OEM stub axles for install and must be used in one of two configurations.
- Installation into factory OPEN differentials is usually plug and play, as long as the correct LSD variant is ordered.
- Installation into factory VLSD differentials requires replacement of either one or both of the input shafts (depending on what variant LSD is ordered and what variation of input shafts came standard on the vehicle).
Stub axles required for installation can be included using the options before adding to cart.
OS Giken Super Lock Differentials do not require any “break-in”. We only recommend that after installation and initial fluid fill to drive the vehicle for 1000 miles or 1 hr of track time and then change differential fluid. Please do not dyno the vehicle while on the initial fill.
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