ZF 4644.323.008 QUILL SHAFT for WG200 | OEM Genuine Part

Overview

The ZF 4644.323.008 QUILL SHAFT is a precision-machined internal component engineered specifically for the WG 200 Series transmission. This OEM genuine part serves as a critical torque-transfer interface within the planetary gear set, ensuring smooth rotational alignment and load distribution between the clutch packs and output shaft. The SKU 4644.323.008 is manufactured to ZF’s original tolerances, making it a direct replacement for worn units in heavy-duty commercial vehicle transmissions. Its hardened steel construction resists torsional fatigue, while the splined ends maintain positive engagement under high-stress conditions.

Symptoms of Failure

When the ZF 4644.323.008 quill shaft begins to fail, operators often notice intermittent gear slipping during uphill climbs—a long-tail search query indicating loss of torque transfer. Another common symptom is metallic grinding noises from the transmission housing, particularly when shifting between second and third gears. You may also observe erratic shift timing or delayed engagement as the worn shaft causes misalignment in the clutch pack assembly. In advanced cases, contaminated transmission fluid with metallic debris appears, signaling internal wear that requires immediate replacement of the quill shaft.

Technical Specifications

Compatibility

This quill shaft is primarily designed for the ZF WG 200 Series transmissions, including models WG180, WG200, and WG210. It also fits select variants of the ZF Ecolite and ZF Ecomid ranges that share the same planetary gear architecture. Always verify the serial number on your transmission housing before ordering, as some early WG200 units may require a different spline configuration. The 4644.323.008 replaces superseded part numbers 4644.323.005 and 4644.323.006.

Related Components

When replacing the quill shaft, inspect these companion parts that share the same assembly. The 4460165051: CONSOLE and 4460368311: CONSOLE provide structural support for the shaft housing. Secure the assembly using the 0636011429: HEXAGON SCREW and 0730100365: WASHER to prevent loosening under vibration.