ZF 4644.321.239 BUSH for WG200 | OEM Genuine Part

Overview

The ZF 4644.321.239 BUSH for WG200 is a precision-engineered wear component designed to support rotating shafts within the transmission housing. This OEM genuine part, identified by SKU 4644.321.239, acts as a sacrificial liner that reduces friction between the shaft and the housing bore in the WG 200 Series. It is typically pressed into the TRANSMISSION HOUSING to maintain correct shaft alignment and oil clearance. Without this bushing, metal-on-metal contact would accelerate wear on the housing itself, leading to costly repairs.

Symptoms of Failure

• Low oil pressure warnings — A worn bushing increases internal leakage, causing the transmission to struggle maintaining proper hydraulic pressure.
• Audible whining or knocking from the bell housing — Excessive radial play from a degraded bushing produces a distinct metallic noise during gear engagement.
• Oil seepage around the shaft seal area — As the bushing wears, the shaft begins to wobble, compromising the seal lip and allowing fluid to escape.
• Delayed or harsh shifting — Misalignment caused by bushing wear affects the SHIFT SYSTEM response, leading to erratic gear changes.

Technical Specifications

Compatibility

This bushing is engineered for the ZF WG200 series of powershift transmissions. It is also compatible with the WG180 and WG150 models that share the same shaft diameter and housing bore geometry. The part interfaces directly with the HOUSING and is often replaced alongside the GROOVED STUD and TYPE PLATE during a full overhaul. Always verify the shaft clearance after installation to ensure proper function of the VALVE BLOCK.

Related Components