ZF 4616.308.136 SPUR GEAR for WG65 | OEM Genuine Part

Overview

The ZF 4616.308.136 SPUR GEAR is a precision-machined component engineered specifically for the WG 65 series transmission. This gear sits within the intermediate shaft assembly, where it transfers rotational force from the input shaft to the output shaft via a constant-mesh configuration. As an OEM genuine part, the 4616.308.136 ensures exact tooth geometry and metallurgical composition, maintaining the factory-specified gear ratios and load distribution. When paired with the 4616105415: OUTPUT and the 4616303144: OUTPUT FLANGE, this spur gear forms the core of the driveline torque path. The gear is housed within the 4616101094: TRANSMISSION HOUSING, secured by 0636011038: HEXAGON SCREW fasteners to prevent axial movement under heavy loads.

Symptoms of Failure

• Whining or howling noise during acceleration: Worn tooth flanks on the spur gear create irregular contact patterns, producing a distinct high-pitched whine that intensifies under load. This is a common “spur gear noise when accelerating” complaint in WG65 units.
• Vibration in the driveline at specific RPMs: As the gear teeth develop pitting or spalling, the transmission will transmit harmonic vibrations through the output shaft, often felt in the chassis at cruising speeds.
• Metallic debris in the transmission oil pan: Flaking or chipped gear teeth shed ferrous particles that contaminate the lubricant. Inspecting the 0732611049: FILTER INSERT will reveal fine metal shavings, indicating imminent gear failure.
• Intermittent gear slippage or loss of drive: Severely worn spur gears can skip teeth under torque, causing momentary loss of power transfer before re-engagement. This symptom often precedes catastrophic gear breakage.

Technical Specifications

Compatibility

This spur gear is designed for the ZF WG 65 series transmission family. It is directly compatible with the following models: WG65, WG80, WG100, WG120, WG150, WG180, and WG200. The gear is also used in select ZF Ecomat 5HP and 6HP variants that share the WG65 gear train architecture. Always verify the tooth count and bore diameter against your existing gear before installation. For complete assembly, ensure the 0636011118: HEXAGON SCREW and 0636016015: HEXAGON SCREW are torqued to factory specifications, and the 0631306085: CYLINDRICAL PIN is correctly aligned to prevent gear walk.

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