ZF 4644.199.721 LOOSE PARTS for WG201 | OEM Genuine Part

Overview

The ZF 4644.199.721 LOOSE PARTS set is a critical OEM genuine service kit designed specifically for the WG 201 series transmission. This assembly contains the necessary loose components required to maintain the internal hydraulic and mechanical integrity of the gearbox. Positioned within the valve body and clutch pack area, this part ensures proper fluid routing and pressure regulation during shifting operations. The SKU 4644.199.721 is a factory-sealed kit that replaces worn or damaged loose hardware, preventing contamination and ensuring precise fitment within the transmission housing.

Symptoms of Failure

When the ZF 4644.199.721 LOOSE PARTS begin to degrade, operators may notice specific performance issues. Oil leaks around the transmission housing are a primary indicator, often caused by degraded sealing surfaces within the kit. Gear slipping during load shifts occurs when internal pressure drops due to loose or misaligned components. Erratic shifting or delayed engagement is another common symptom, as worn parts fail to maintain consistent hydraulic flow. Additionally, metallic debris in the transmission fluid can signal that loose hardware has fractured, requiring immediate replacement of the 4644.199.721 kit.

Technical Specifications

Compatibility

This ZF 4644.199.721 LOOSE PARTS kit is engineered for the WG 201 transmission series, but it also fits select models within the WG 180 and WG 200 families due to shared internal architecture. It is commonly used in industrial vehicles, construction equipment, and heavy-duty trucks where the WG series gearbox is installed. For proper installation, this kit works in conjunction with the 4644101203 TRANSMISSION HOUSING and the 4644301382 TRANSMISSION HOUSING, which provide the structural enclosure. Additionally, the 4644301189 THREADED BUSH and the 0636302005 SCREW PLUG are often replaced simultaneously to ensure a complete seal.

Related Components