ZF 4644.311.082 DRIVER for WG181 | OEM Genuine Part

Overview

The ZF 4644.311.082 DRIVER is a critical rotational component engineered specifically for the WG 181 Series transmission. This OEM genuine part functions as the primary torque input element, transferring power from the engine to the gearset within the clutch housing assembly. Positioned directly on the input shaft, the 4644.311.082 ensures precise engagement and disengagement of drive gears during shifting operations. As a factory-specification replacement, this SKU guarantees exact fitment and durability under high-load industrial conditions, making it essential for maintaining transmission integrity in heavy-duty applications.

Symptoms of Failure

When the ZF 4644.311.082 DRIVER begins to wear, operators may notice distinct performance issues. Common failure indicators include:

• Intermittent gear slipping under load – A worn driver can cause the transmission to lose torque transfer, particularly during uphill climbs or heavy hauling.
• Abnormal grinding or whining noise – Damaged splines or bearing surfaces produce audible metal-on-metal sounds from the bell housing area.
• Delayed or harsh engagement – The driver’s inability to maintain proper alignment leads to sluggish shifts or sudden jolts when selecting gears.
• Oil contamination from metal debris – Friction wear particles from the driver can circulate through the hydraulic system, clogging filters and valves.

Technical Specifications

Compatibility

This DRIVER is a direct-fit component for the ZF WG 181 Series transmission family. It is also compatible with the WG 180 and WG 200 series models that share the same input shaft architecture. The 4644.311.082 is commonly found in off-highway vehicles, municipal trucks, and construction equipment utilizing ZF’s modular gearbox platform. For exact cross-referencing, always verify the transmission serial number against the OEM parts catalog.

Related Components

During installation of the 4644.311.082 DRIVER, it is recommended to inspect and replace adjacent parts in the assembly. The TRANSMISSION HOUSING (4644101047) provides the structural envelope for the driver, while the HOUSING (4644301380) supports the bearing seats. The THREADED BUSH (4644301189) secures the driver’s axial position, and the TYPE PLATE (0730365067) ensures correct identification after service.