5.43 - 7x38 Final Drive for BMW E30/E36 -188mm Diff-

Final Drive for BMW E30 / E36

Medium Case Differential (188 mm)

Available Ratio:

• 5.43 – 7/38

Material:

Manufactured from billet and forged Ni-Cr-Mo steel, delivering exceptional mechanical strength, high impact resistance, and long-term durability under extreme torque loads and aggressive driving conditions.

Hardness:

• HRC 56–60, ensuring excellent resistance to wear and surface fatigue, even in demanding motorsport applications.

Surface Treatments:

Multiple advanced surface treatment processes are applied to maximize durability and reliability:

• Sandblasting – Ensures a uniform surface finish and optimal surface preparation

• Shot peening – Increases fatigue strength by inducing compressive surface stresses

• WPC treatment – Enhances surface hardness, reduces friction, and improves micro-surface durability

Heat Treatments:

To achieve maximum strength, dimensional stability, and service life, the following heat treatments are applied:

• Carburizing – Produces a hard, wear-resistant surface while maintaining a tough core

• Cryogenic treatment – Improves dimensional stability, wear resistance, and long-term gear mesh performance

Performance Benefits:

• Increased torque multiplication and dramatically improved acceleration

• Designed specifically for BMW E30 and E36 medium case (188 mm) differentials

• High resistance to shock loads and sustained high-RPM operation

• Suitable for motorsport and high-performance street use