ZF 4644.306.326 GEAR SHIFT HOUSING for WG200/WG201 | OEM Genuine Part

Overview

The ZF 4644.306.326 GEAR SHIFT HOUSING is a critical structural component designed for the WG200 and WG201 series transmissions. This OEM genuine part encloses the shift mechanism, providing precise alignment for the selector forks and shafts that control gear engagement. Positioned directly on the transmission main case, the housing acts as a sealed interface, protecting internal shift components from contaminants while maintaining hydraulic pressure integrity. The SKU 4644.306.326 is engineered to ZF’s original specifications, ensuring a direct fit and long service life in heavy-duty commercial applications.

Symptoms of Failure

• External oil leaks around the shift tower: A cracked or warped housing allows transmission fluid to seep past gaskets, often visible as drips near the gear selector area.
• Hard or imprecise gear engagement: Worn housing bores cause shift rail misalignment, leading to grinding or difficulty selecting gears, especially under load.
• Unusual mechanical noise during shifting: Loose or fractured housing mounts create vibration and clattering sounds as the shift mechanism moves out of spec.
• Contamination of shift components: A compromised housing lets dirt and moisture enter, accelerating wear on internal parts like forks and detent springs.

Technical Specifications

Compatibility

This gear shift housing is specifically engineered for ZF’s WG200 and WG201 series transmissions. It is also compatible with the WG180 model due to shared shift architecture. The part is designed to work with the 4460115043 HOUSING and the 4469315012 AXLE DRIVE HOUSING, which form the primary case assembly. For proper installation, the 0750117406 TAPER ROLLER BEARING and 0750117802 TAPERED ROLLER BEARING must be checked for wear, as they support the shift shafts within this housing.

Related Components