Overview
The ZF 4616.308.153 GEAR is a critical internal component engineered specifically for the WG 65 Series transmission family. This OEM genuine part functions as a precision-machined drive gear within the planetary gearset, facilitating smooth torque transfer and speed regulation under heavy-duty industrial loads. Identified by the SKU 4616.308.153, this gear interfaces directly with the 4616105402: OUTPUT shaft assembly and is housed within the 4616101119: TRANSMISSION HOUSING. Its role is essential for maintaining synchronized rotation between the input and output stages, ensuring reliable performance in demanding B2B applications such as construction, mining, and municipal vehicles.
Symptoms of Failure
- Audible gear whining or grinding noise during acceleration: Worn teeth on the 4616.308.153 gear create irregular contact patterns, producing a high-pitched whine or metallic grinding sound that intensifies under load.
- Intermittent gear slipping or loss of power transfer: As the gear surface degrades, the transmission may momentarily lose engagement, causing sudden RPM spikes without corresponding vehicle movement.
- Metal particles in transmission fluid: Advanced wear releases fine metallic debris into the oil, often visible during routine fluid changes or as sludge in the filter.
- Vibration through the driveline at specific speeds: Eccentric wear or chipped teeth induce cyclical vibrations that can be felt in the chassis, particularly when the transmission is under moderate torque.
Technical Specifications
| Specification | Value |
|---|---|
| Part Number | 4616.308.153 |
| Material | Case-hardened alloy steel (20MnCr5 equivalent) |
| Weight | 1.85 kg (4.08 lbs) |
| Outer Diameter | 112 mm |
| Tooth Count | 37 |
| OEM Reference | ZF 4616.308.153 |
| Hardness | 58-62 HRC |
Compatibility
This gear is designed for the ZF WG 65 Series transmission models, including the WG65, WG80, WG100, WG120, WG150, WG180, and WG200 variants. It is a direct replacement for OEM installations in trucks, buses, and off-highway equipment where the WG65 planetary gearset is employed. Always verify the gear’s tooth profile and spline count against your existing assembly before installation. For complete rebuilds, pair this gear with the 4005303005: OUTPUT FLANGE and secure all fasteners using the 0636011038: HEXAGON SCREW to ensure proper clamping force.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4616105402 | OUTPUT | Transfers torque from gearset to driveline |
| 4005303005 | OUTPUT FLANGE | Connects output shaft to universal joint |
| 4616101119 | TRANSMISSION HOUSING | Encloses and supports gear assembly |
| 0636011038 | HEXAGON SCREW | Secures housing and flange components |
| 0636011118 | HEXAGON SCREW | Fastens gear retention plates |
| 0636016015 | HEXAGON SCREW | Mounts bearing caps |
| 0631306085 | CYLINDRICAL PIN | Aligns gear and shaft during assembly |
| 0634313118 | O-RING | Seals fluid passages |
| 0636304019 | SCREW PLUG | Closes inspection ports |
| 0634801152 | SEALING RING | Prevents oil leakage at joints |
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