ZF 4644.306.337 GEAR SHIFT HOUSING for WG200/WG201 | OEM Genuine Part

Overview

The ZF 4644.306.337 GEAR SHIFT HOUSING is a precision-machined component that serves as the structural interface for the shift mechanism within the WG200 and WG201 transmission series. This OEM genuine part encloses the shift forks and selector rails, ensuring precise gear engagement and smooth directional changes under load. Constructed from high-strength aluminum alloy, the housing withstands thermal expansion and mechanical stress in heavy-duty industrial applications. The SKU 4644.306.337 is a direct replacement for worn units, restoring factory-spec shift feel and preventing misalignment that can lead to driveline damage.

Symptoms of Failure

• External oil seepage around the shift tower: Cracks or gasket degradation in the 4644.306.337 housing allow transmission fluid to escape, leaving visible drips on the bell housing or under the vehicle.
• Difficulty engaging gears or gear clash: Warpage or wear in the shift housing bore causes binding of the shift rail, resulting in notchy, hard shifts or grinding during engagement.
• Unexplained neutral drift or gear pop-out: A distorted housing fails to maintain proper detent alignment, allowing the transmission to slip out of gear under load.
• Increased shift lever play: Internal pivot point wear within the housing creates excessive lateral movement at the shift lever, reducing driver control.

Technical Specifications

Compatibility

This gear shift housing is engineered for the ZF WG200 and WG201 series transmissions, commonly found in medium-duty trucks, buses, and off-highway equipment. It is also compatible with the WG180 series when used with the appropriate TRANSMISSION HOUSING (4644101164) or TRANSMISSION HOUSING (4644301371). For proper identification, always cross-reference the TYPE PLATE (0730365067) affixed to your unit. Secure the assembly using a GROOVED STUD (0631311009) to maintain correct torque specifications.

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