4.71 / 4.92 / 5.25 Final Drive for Nissan Micra / March JB3/JH3/JHQ gearbox

Final Drive for Nissan Micra K12 SR160, K13 & K14

Renault JH3 / JHQ / JB3 Gearboxes

Available Ratios:

• 4.71 – 14/66
• 4.92 – 12/59
• 5.25 – 12/63

Material:

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

Hardness:

• HRC 56–60, ensuring excellent resistance to wear and surface fatigue, even in motorsport and high-performance street applications.

Surface Treatments:

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

• Sandblasting – Ensures 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 improved acceleration
• Designed specifically for Nissan Micra K12 SR160, K13 and K14
• Fully compatible with Renault JH3, JHQ and JB3 gearboxes
• High resistance to shock loads and sustained high-RPM operation
• Suitable for motorsport and high-performance street use