Ford 8.8 OS GIKEN LSD

OS Giken Super Lock LSD
 
Overview
The OS Giken Super Lock LSD is a high-end limited-slip differential from Japan designed for racers seeking ultimate control and tunability. With multiple ramp and pressure adjustments, it can be fine-tuned to optimize your car's handling under braking and acceleration. It offers three ramp settings: 1-way, 1.5-way, and 2-way, making it suitable for a wide range of driving styles and conditions.
 
Compatible with our Ford Explorer 8.8 based swap kits which all use 31 spline axles. This LSD delivers race-proven performance with unparalleled reliability.
 
For maximum durability, use with OS Giken Gear oil found [HERE]
 
Base Spec-S OSG Settings:
Ramp Angle: 25 Acceleration/35 Decelleration (1.5-way)
Preload: 10S
Lock Timing: 336
Plate Count: 20
 
For a personally tailored LSD, check out the custom tune service we offer [HERE]
 
Key Features
Patented Pressure Ring Design: Allows smooth and progressive locking for better handling.
20 High Friction Plates: Fits up to twice as many plates as competitors for superior locking modulation.
Durability:
Chemically heat-treated components for maximum lifespan.
High-grade steel alloy construction for unparalleled strength.
Raw-forged gears for added durability.
Precision Engineering:
Clutch disks machined on both sides to tight tolerances, minimizing warpage.
LSD case crafted from a single billet piece for uniformity.
Quiet and Predictable Operation: The progressive locking mechanism enhances drivability and maintains everyday usability.
 
Tunability
The OS Giken Super Lock LSD is designed for customization, enabling you to maximize traction and adapt to your car’s power output and handling characteristics.
Adjust Initial Torque: Modify cone spring thickness to fine-tune preload.
Lock Progression Timing: Customize stiffness of pressure ring springs for smoother or more aggressive engagement.
Ramp Angle Modifications: Swap the pressure ring and iron cross for bespoke handling characteristics.
TCD Spec Disks: Upgrade for enhanced oil cooling and even smoother operation.
 
Why Choose the OS Giken Super Lock LSD?
Upgrading from an open differential to the OS Giken Super Lock LSD transforms your driving experience. Its advanced engineering and superior tunability ensure improved traction, smoother locking, and greater control on the track and street alike.
 
LSD Ramp Types Explained
1-Way: Locks only under acceleration.
Ideal for autocross or situations where quick turn-in and minimal braking lock-up are preferred.
1.5-Way: Provides strong lock under acceleration and reduced lock under deceleration.
Generally the best choice for road racing and time attack, offering stability on corner entry without being overly aggressive.
2-Way: Locks equally (or nearly equally) under both acceleration and deceleration.
Most commonly used for drifting where consistent lock in both directions is desired.
 
The OS Giken Ramp Angle: Measuring the Resulting Lock
OS Giken's engineers approach the measurement from the perspective of the resulting lock effect, rather than the physical angle of the ramp itself. 
 
OS Giken lists their ramp angles based on the Angle of the Resulting Force or the Effective Lock Angle created by the combination of the ramp and the force applied.
 
For the OS Giken Super Lock LSD listed as 25/35 (which is a common 1.5-Way setup)
25° (Acceleration/Drive): This angle is designed to create a very strong, positive, and aggressive lock during acceleration.
35° (Deceleration/Coast): This angle is designed to create a softer, milder lock during deceleration (the 1.5-Way action) to aid in smooth turn-in and corner entry, preventing instability.