ZF 4644.306.311 GEAR SHIFT HOUSING for WG200 | OEM Genuine Part

Overview

The ZF 4644.306.311 GEAR SHIFT HOUSING is a critical structural component within the WG200 series transmission, serving as the mounting point and protective enclosure for the shift mechanism and selector forks. This OEM genuine part, identified by SKU 4644.306.311, sits directly atop the main transmission casing and houses the shift rails, detent springs, and interlock pins that govern gear engagement. Precision-machined from high-strength cast iron, this housing ensures accurate alignment of the shift linkage, preventing mis-shifts and reducing wear on internal components. For optimal rebuild integrity, this housing is frequently paired with the 4460115043: HOUSING which encloses the adjacent clutch pack assembly.

Symptoms of Failure

• External oil seepage around shift tower: A cracked or warped gear shift housing allows transmission fluid to escape, often visible as wetness on the bell housing or drip lines under the vehicle. This is a common long-tail search query for “ZF WG200 oil leak shift housing.”
• Difficulty engaging gears or “notchy” shifting: When the housing bore wears or distorts, shift rail alignment is compromised, causing the driver to force the lever or experience resistance during gear changes.
• Unintended gear disengagement: A damaged housing can allow the shift detent mechanism to lose tension, leading to the transmission jumping out of gear under load—a symptom frequently searched as “WG200 jumps out of gear.”
• Excessive shift lever play: Worn pivot points or cracks in the housing casting create lateral movement in the shift lever, reducing precision and increasing the risk of internal damage.

Technical Specifications

Compatibility

This genuine ZF 4644.306.311 gear shift housing is engineered specifically for the WG200 series transmissions, including the WG180, WG200, and WG210 variants used in heavy-duty commercial vehicles and off-highway equipment. It is also compatible with select ZF Ecomat 4HP and 5HP series where the shift tower design matches the WG200 architecture. When rebuilding, always inspect the 4469315012: AXLE DRIVE HOUSING for cracks, as it shares the same oil circuit and experiences similar thermal stress. Additionally, the shift rails inside this housing require precise bearing support; replace the 0750117406: TAPER ROLLER BEARING and the 0750117802: TAPERED ROLLER BEARING during any housing replacement to maintain proper shaft alignment and preload.

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