Litens 920377A Overrunning Alternator Pulley OAP

The Litens 920377A is an overrunning alternator pulley (OAP) engineered to reduce noise, vibration, and harshness (NVH) in the accessory drive belt system. As the original inventor of the overrunning alternator pulley technology, Litens manufactures this component to OEM-equivalent standards, ensuring a direct, precise fit and long service life.

The overrunning alternator pulley works by allowing the alternator shaft to temporarily "freewheel" during deceleration events in the belt drive cycle. This decoupling action reduces belt tension fluctuations, minimizes belt slippage, and protects the alternator bearings from shock loads — extending the service life of both the belt and the alternator.

Key Features:

• OEM-quality overrunning alternator pulley from the originator of OAP technology
• Reduces belt system noise, vibration, and harshness (NVH)
• Protects alternator bearings by absorbing torsional load spikes
• Extends accessory drive belt life by reducing tension fluctuations
• Direct OEM replacement — no modifications required
• Manufactured to original equipment specifications for precise fitment
• Durable construction for long service life under demanding engine bay conditions

The Litens 920377A is a trusted, professional-grade replacement for worn or failed overrunning alternator pulleys. It is recommended to inspect and replace the OAP during routine belt service to prevent unexpected failures.