OS Giken SuperLock LSD, BMW E38

OS Giken SuperLock LSD for BMW E38 740i (M60) / 750i – High-Performance Limited Slip Differential

Upgrade the differential on your BMW E38 740i or 750i with the OS Giken SuperLock LSD—designed for smooth, reliable, and high-performance locking behavior in both street and performance applications. This limited slip differential features OS Giken’s patented pressure ring technology and spline-through-side-gear design, allowing for up to twice as many friction plates as conventional LSD units. That means stronger engagement, better control, and longer-lasting durability.

Whether you're restoring drivability to your luxury sedan or preparing your V8 or V12 E38 for spirited performance, this LSD delivers seamless traction without the harsh behavior found in lesser units.

Key Features:

• Patented pressure ring system for progressive, predictable lock-up
• Spline-through-side-gear construction allows higher friction plate count
• Low preload with 100% locking capability provides smooth engagement under load
• Chemical heat treatment on all components for extreme durability
• Built from high-strength forged steel
• Billet-machined differential case for consistent structural integrity
• Clutch discs machined simultaneously on both sides to ensure flatness and reliability

Perfect for replacing the factory open or worn-out LSD in your E38, the OS Giken SuperLock enhances rear-end grip, improves high-speed stability, and maintains smooth operation in everyday driving conditions.

Specifications:

• Ramp Angles: 25 / 35
• Lock Timing: 336
• Total Friction Plates: 20
• Preload: 10S

Fitment:

• BMW E38 740i with M60 engine
• BMW E38 750i with Final Drive 1213916

Installation Notes:
Refer to the OEM BMW service manual. Professional installation strongly recommended.