NISSAN 31377-1XB0C Transmission Oil Pan Bolt

This genuine Nissan (SKU: 31377-1XB0C) transmission oil pan retaining bolt is a premium quality, high-tensile fastener essential for the secure and leak-free mounting of the transmission oil pan. Genuine (OEM) parts guarantee a precise fit and factory-specified tightening torque, protecting the transmission system from critical fluid loss.

Technical Features and Specifications

• Manufacturer: Nissan (Genuine OEM part)
• Part Type: Transmission Oil Pan Retaining Bolt (Bolt)
• Material: High-strength, heat-treated steel alloy
• Surface Treatment: Corrosion-resistant coating against environmental factors and moisture
• Function: Providing uniform clamping force on the transmission oil pan gasket

Role and Importance of the Retaining Bolt

The transmission oil pan holds the hydraulic fluid required for lubricating the transmission mechanism. The function of the retaining bolts is to compress the gasket evenly and tightly against the transmission housing. Using substandard or damaged bolts can result in uneven gasket pressure, leading to fluid leaks through microscopic gaps.

Common Signs of Wear or Damage

• Thread Damage: Threads may stretch or strip due to over-tightening or improper installation.
• Corrosion: Due to their undercarriage location, the bolts are exposed to moisture and road salt, which can lead to rusting.
• Fatigue Elongation: Continuous thermal fluctuations (heating and cooling cycles) can cause metal fatigue, leading to a loss of optimal clamping load.

During transmission maintenance, fluid replacement, or gasket service, renewing the retaining bolts is highly recommended to ensure a secure and durable seal.