ZF 4644.303.514 SPUR GEAR for WG201 | OEM Genuine Part

Overview

The ZF 4644.303.514 SPUR GEAR is a precision-machined component engineered for the WG 201 series transmission, serving as a critical element in the gear train that transfers torque between shafts. This OEM genuine part, identified by SKU 4644.303.514, sits within the planetary gear set assembly, where its helical-cut teeth ensure smooth power delivery and reduced noise under heavy loads. Designed to withstand high rotational speeds and continuous duty cycles, this spur gear directly influences shift quality and overall driveline efficiency in commercial vehicles and industrial machinery.

Symptoms of Failure

When the 4644.303.514 spur gear wears out, operators may notice distinct performance issues. Whining or grinding noises during acceleration often indicate tooth surface fatigue or pitting, a common failure mode in high-mileage transmissions. Intermittent gear slipping under load occurs when worn teeth fail to maintain proper mesh, leading to power loss on inclines. Metallic debris in the transmission fluid is a clear sign of gear degradation, often accompanied by erratic shifting patterns as the control system compensates for reduced torque capacity. Early detection of these symptoms can prevent catastrophic damage to the TRANSMISSION HOUSING and TRANSMISSION HOUSING assemblies.

Technical Specifications

Compatibility

This spur gear is specifically designed for the ZF WG 201 series, but its dimensions and tooth profile also suit several related transmission models. Compatible units include the WG180, WG200, and WG211 series, where it replaces worn gears in the intermediate shaft cluster. For installations requiring a THREADED BUSH or SCREW PLUG, these components must be torqued to factory specifications to ensure proper gear alignment. Always verify the gear’s tooth count and bore diameter against your transmission’s service manual before ordering.

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