ZF 4644.308.472 SPUR GEAR for WG180 | OEM Genuine Part

Overview

The ZF 4644.308.472 SPUR GEAR is a precision-machined helical gear designed for the power take-off (PTO) drive train within the WG 180 series transmission. This OEM genuine part transfers rotational force from the input shaft to the auxiliary output, enabling reliable power distribution for industrial and heavy-duty applications. Located in the intermediate gear cluster, the spur gear (SKU: 4644.308.472) ensures smooth torque delivery and minimal backlash. It works in concert with the 4644105413: DISCONNECTION mechanism to engage or disengage the PTO system, while the 4642303093: OUTPUT FLANGE connects the gear to downstream equipment. The entire assembly is housed within the 4644101222: TRANSMISSION HOUSING, secured by 0636021010: HEXAGON SCREW fasteners.

Symptoms of Failure

• Whining or grinding noise from PTO area – Worn gear teeth create audible metal-on-metal contact during engagement, often worsening under load.
• Intermittent PTO disengagement or slipping – Damaged spur gear teeth fail to maintain positive mesh, causing the PTO to slip or drop out unexpectedly.
• Metallic debris in transmission fluid – Flaking or chipped gear material contaminates the oil, visible as glitter or sludge during drain intervals.
• Vibration through chassis at specific RPMs – Uneven tooth wear induces harmonic vibrations that resonate through the driveline, particularly at cruising speeds.

Technical Specifications

Compatibility

This spur gear is primarily designed for the ZF WG 180 series transmissions, including models WG180, WG180-1, and WG180-2. It is also compatible with the WG200 series (WG200, WG200-1) when used in PTO configurations with matching spline counts. The gear interfaces directly with the 4644105413: DISCONNECTION shaft and the 4642303093: OUTPUT FLANGE. Always verify tooth count and bore spline profile against your transmission’s service manual before installation.

Related Components