NISSAN 33111-VV20A Transfer Case Input Shaft Oil Seal

This genuine NISSAN transfer case input oil seal (part number: 33111-VV20A) is a premium quality, original OEM component that ensures optimal sealing and reliable operation of the drivetrain system. Located at the transfer case input shaft, the primary function of this radial shaft seal is to prevent gear oil leakage while providing effective protection against external contaminants (dust, moisture, mud).

Technical Features and Specifications:

• Manufacturer: NISSAN (Genuine OEM)
• OEM Part Number: 33111-VV20A
• Replacement / Alternative Numbers: 3311101J00
• Part Type: Transfer Case Input Shaft Oil Seal (SEAL-OIL)
• Material Composition: High heat- and wear-resistant specialized elastomer (NBR/FKM), providing excellent resistance to synthetic and mineral gear oils.
• Design: Engineered with a precision sealing lip and an additional dust protection lip for maximum service life.

Role and Importance of the Oil Seal:

The transfer case is one of the most critical structural assemblies in four-wheel-drive and all-wheel-drive vehicles. The input shaft oil seal is in direct contact with the rotating shaft, exposing it to constant friction and thermal stress. If the seal fails, lubricating oil leaks out, resulting in dry running, overheating, and premature failure of internal transfer case components (gears, bearings).

Typical Symptoms of Wear or Failure:

• Oil leaks or oil mist appearing at the junction between the transfer case and transmission.
• Fresh oil spots underneath the vehicle when parked.
• Abnormal humming or whining noises from the drivetrain, especially during acceleration or at constant speeds (due to low oil level).

A leaking oil seal must be replaced promptly to prevent major and costly drivetrain damage. Genuine NISSAN parts guarantee a precise fit and factory-original service life.