NISSAN 38102-12S00 Ring Gear Bolt

The genuine OEM Nissan 38102-12S00 drive gear bolt (ring gear bolt) is a high-tensile fastener engineered to securely attach the differential ring gear to the differential case (carrier). Because this bolt is directly involved in transmitting engine torque through the final drive, it is manufactured to exceptionally stringent quality and metallurgical standards to ensure safe and reliable drivetrain operation.

Technical Features and Specifications:

• Material: Specially heat-treated, high-tensile alloy steel designed to endure continuous dynamic stresses and heavy vibrational loads.
• OEM Specification: Guarantees accurate thread pitch and dimensional tolerances to ensure exact compliance with factory torque and angle-tightening specifications.
• Safety: Engineered shank and head transition to prevent stress concentration, minimizing the risk of fatigue failure.
• Installation Recommendation: Whenever servicing the differential or replacing the ring gear, mounting bolts should always be replaced with brand-new units in accordance with manufacturer service instructions (single-use torque-to-yield fasteners).

Function and Importance:

Ring gear bolts establish the critical structural connection between the final drive gear and the differential carrier, preventing any microscopic slippage or deflection under load. Reusing stretched bolts or installing non-OEM fasteners can cause improper gear mesh, tooth breakage, and catastrophic differential failure.

Common Symptoms of Wear or Loosening:

• Increasing humming, whining, or metallic clicking noises emanating from the differential under load.
• Fine metal shavings or metallic contamination found in the differential gear oil.
• Abnormal drivetrain vibrations occurring at higher speeds.