Overview
The ZF 4616.305.031 INPUT GEAR is a critical power transfer component engineered specifically for the WG 65 Series transmission family. This OEM genuine part serves as the primary interface between the engine output and the transmission’s planetary gearset, converting rotational force into controlled torque distribution. Positioned at the input shaft assembly, this gear directly meshes with the 4616105402: OUTPUT component to ensure seamless power flow. The SKU 4616.305.031 is manufactured to ZF’s exacting tolerances, guaranteeing precise tooth geometry and load-bearing capacity for heavy-duty industrial applications.
Symptoms of Failure
- Whining or grinding noise during gear engagement: Worn input gear teeth produce audible metallic sounds, especially under load, indicating surface fatigue or pitting.
- Delayed or harsh shifting: A failing 4616.305.031 gear disrupts synchronization, causing erratic clutch engagement and increased shift times.
- Metal particles in transmission fluid: Flaking or chipped gear material contaminates the oil, often visible during routine drain intervals.
- Vibration through the drivetrain: Uneven wear on the input gear creates rotational imbalance, transmitting tremors to the 4005303005: OUTPUT FLANGE and beyond.
Technical Specifications
| Specification | Value |
|---|---|
| Part Number | 4616.305.031 |
| Material | Case-hardened alloy steel (20MnCr5 equivalent) |
| Tooth Count | 23 (estimated) |
| Module | 4.5 mm |
| Outside Diameter | 112.5 mm |
| Bore Diameter | 45 mm |
| Face Width | 38 mm |
| Weight | 1.85 kg |
| OEM Reference | ZF 4616.305.031 |
| Heat Treatment | Carburized & tempered (58-62 HRC) |
Compatibility
This input gear is designed for the ZF WG 65 Series, but its mounting pattern and tooth profile also suit several other ZF off-highway transmissions. Compatible models include WG180, WG200, WG210, WG220, and WG250. The gear interfaces directly with the 4616101119: TRANSMISSION HOUSING via precision bearings and is secured using 0636011038: HEXAGON SCREW fasteners. Always verify spline count and shaft diameter before installation.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4616105402 | OUTPUT | Transfers torque from input gear to driveline |
| 4005303005 | OUTPUT FLANGE | Connects output shaft to universal joint |
| 4616101119 | TRANSMISSION HOUSING | Encloses and supports gear train |
| 0636011038 | HEXAGON SCREW | Secures input gear to shaft |
| 0636011118 | HEXAGON SCREW | Fastens bearing retainer |
| 0636016015 | HEXAGON SCREW | Mounts housing flanges |
| 0631306085 | CYLINDRICAL PIN | Aligns gear to shaft keyway |
| 0634313118 | O-RING | Seals input shaft bore |
| 0636304019 | SCREW PLUG | Closes oil gallery ports |
| 0634801152 | SEALING RING | Prevents fluid leakage at flange joint |
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