ZF 4644.199.478 LOOSE PARTS for WG200 | OEM Genuine Part

Overview

The ZF 4644.199.478 LOOSE PARTS for WG200 is a critical internal component designed for the WG 200 Series automatic transmissions. This OEM genuine part functions as a precision-engineered assembly element, typically serving as a spacer, thrust washer, or retaining component within the planetary gear set or clutch pack. Its primary role is to maintain exact axial clearances and ensure smooth torque transfer under heavy-duty industrial loads. The SKU 4644.199.478 is factory-matched to ZF’s stringent tolerances, making it essential for restoring factory-spec performance during a rebuild or repair. This part integrates directly with the 4644101249: TRANSMISSION HOUSING and the 4644301402: TRANSMISSION HOUSING to secure internal alignment.

Symptoms of Failure

When the 4644.199.478 component wears or deforms, operators will notice distinct operational issues. Common failure symptoms include:

• Erratic gear engagement or delayed shifting – Worn clearances cause the clutches to drag or slip, leading to harsh or late shifts under load.
• Metallic grinding or rattling noises from the transmission housing – Loss of axial support allows gear teeth to contact incorrectly, producing audible wear sounds.
• Low transmission oil pressure warnings – Internal leakage past the worn part reduces hydraulic circuit integrity, triggering pressure drop alerts.
• Progressive oil seepage around the bell housing – Distortion of the component can compromise the seal path, especially near the 0634306323: O-RING interface.

Technical Specifications

Compatibility

This genuine ZF loose part is primarily designed for the WG 200 Series transmissions. Based on its dimensional profile and function, it is also compatible with the following ZF models: WG180, WG200, and WG210 series. It is frequently used alongside the 4644301298: COVER PLATE to secure the clutch drum assembly. Always verify your transmission serial number before ordering.

Related Components