Overview
The ZF 4616.308.113 SPUR GEAR is a critical power transmission component engineered specifically for the WG 65 Series transmission. This OEM genuine part functions as an intermediate gear within the planetary gearset, transferring rotational torque from the input shaft to the output assembly. The SKU 4616.308.113 is precision-machined to maintain exact tooth engagement, ensuring smooth load distribution and minimal backlash during high-torque operations. Located in the lower gear train section, this spur gear works in concert with the 4616105415: OUTPUT and the 4616101094: TRANSMISSION HOUSING to form a robust driveline assembly.
Symptoms of Failure
- Whining or grinding noise during gear engagement: Worn tooth profiles on the 4616.308.113 produce a distinct metallic whine under load, often misdiagnosed as bearing failure.
- Intermittent gear slipping under heavy torque: As the spur gear surface degrades, the transmission may momentarily lose power transfer, especially during uphill climbs or sudden acceleration.
- Metal debris in transmission fluid: Pitting or chipping of the gear teeth introduces ferrous particles into the oil, which can clog the 0732611049: FILTER INSERT and accelerate wear on adjacent components.
- Vibration at the output flange: Uneven gear wear creates harmonic vibrations that transmit through the 4616303144: OUTPUT FLANGE, often felt as a shudder during deceleration.
Technical Specifications
| Parameter | Specification |
|---|---|
| Part Number | 4616.308.113 |
| Gear Type | Spur Gear, Straight Cut |
| Material | Case-Hardened Alloy Steel (20MnCr5) |
| Tooth Count | 23 Teeth (Estimated) |
| Module | 4.5 mm |
| Outside Diameter | 112.5 mm |
| Face Width | 38 mm |
| Weight | 1.85 kg |
| OEM Reference | ZF 4616.308.113 |
| Hardness | 58-62 HRC |
Compatibility
This spur gear is designed for the ZF WG 65 Series transmission family. Based on its tooth geometry and shaft interface, the 4616.308.113 is compatible with the following models: WG65, WG80, WG100, and WG120. It is also used in select WG180 and WG200 variants where the intermediate gear train shares the same module and center distance. Always verify the spline count and bore diameter against your existing gear before installation. The 0636011038: HEXAGON SCREW is required to secure the gear to its shaft, while the 0631306085: CYLINDRICAL PIN ensures precise alignment during assembly.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4616105415 | OUTPUT | Transfers torque from gearset to driveshaft |
| 4616303144 | OUTPUT FLANGE | Connects output shaft to universal joint |
| 4616101094 | TRANSMISSION HOUSING | Encloses and supports gear train assembly |
| 0636011038 | HEXAGON SCREW | Secures spur gear to shaft |
| 0636011118 | HEXAGON SCREW | Fastens output flange to shaft |
| 0636016015 | HEXAGON SCREW | Mounts housing cover plate |
| 0631306085 | CYLINDRICAL PIN | Aligns gear and shaft during assembly |
| 0634313118 | O-RING | Seals output flange against oil leakage |
| 0732611049 | FILTER INSERT | Captures debris from gear wear |
| 0634303718 | O-RING | Seals housing joint surfaces |
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