ZF 4644.104.422 DIFFERENTIAL for WG 180/WG 200 | OEM Genuine Part

Overview

The ZF 4644.104.422 DIFFERENTIAL is a critical power-distribution component engineered specifically for the WG 180 and WG 200 transmission series. This OEM genuine part manages torque split between the output shafts, ensuring smooth cornering and consistent traction under heavy industrial loads. Located within the rear axle housing assembly, the differential works in concert with the 4644101175: TRANSMISSION HOUSING and the 4644301221: TRANSMISSION HOUSING to maintain precise gear alignment. The SKU 4644.104.422 is manufactured to ZF’s exacting tolerances, making it a direct replacement for worn units in WG200 series drivelines.

Symptoms of Failure

• Oil leaks near the differential housing: Worn seals or bearing surfaces cause lubricant to escape, often visible as drips under the transmission bell housing.
• Gear slipping or clunking during turns: Damaged spider gears or side gears produce audible knocking or a momentary loss of drive power when navigating corners.
• Vibration at highway speeds: Imbalanced differential internals create a rhythmic shudder that intensifies with vehicle speed, indicating worn pinion bearings or ring gear wear.
• Increased operating temperature: Excessive friction from degraded differential components leads to overheating, detectable by a burnt gear oil smell or thermal warning lights.

Technical Specifications

Compatibility

This differential is designed for the ZF WG 180 and WG 200 transmission families. It directly replaces the original unit in WG200 series applications, including models with integrated retarders. The part also fits select WG180 variants where the differential housing matches the bolt pattern of the 0730365067: TYPE PLATE and is secured using the 0631311009: GROOVED STUD. Always verify your transmission serial number against the OEM parts list before ordering.

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