Overview
The ZF 4616.102.057 INPUT for WG65 is a critical driveline component engineered to transfer torque from the engine directly into the transmission gearset. Positioned at the front of the main shaft assembly, this OEM genuine part ensures precise rotational engagement and load distribution within the WG 65 series. The SKU 4616.102.057 is machined to exact ZF tolerances, making it essential for maintaining shift quality and power flow in heavy-duty industrial applications. When paired with a robust TRANSMISSION HOUSING, this input shaft guarantees structural alignment and long-term durability under high-stress conditions.
Symptoms of Failure
- Persistent oil leaks around the bell housing: Worn splines or bearing surfaces on the 4616.102.057 can cause seal misalignment, leading to fluid seepage that contaminates clutch packs.
- Gear slipping under load: A damaged input shaft loses its ability to maintain positive engagement, resulting in intermittent power loss during acceleration or uphill operation.
- Abnormal vibration or whining noise: Excessive wear on the input shaft’s bearing journals creates harmonic imbalance, producing audible noise that intensifies with RPM.
- Hard shifting or delayed engagement: When the input shaft’s splines become stripped or galled, the transmission struggles to synchronize gear changes, especially from neutral to drive.
Technical Specifications
| Specification | Detail |
|---|---|
| Part Number | 4616.102.057 |
| Material | Case-hardened alloy steel (20MnCr5 equivalent) |
| Overall Length | 285 mm |
| Spline Diameter | 42 mm (involute spline) |
| Weight | 3.2 kg |
| OEM Reference | ZF 4616.102.057 |
| Surface Finish | Black oxide coating |
Compatibility
This input shaft is specifically designed for the ZF WG 65 series of powershift transmissions. It is also compatible with the following ZF models that share the same input architecture: WG180, WG200, WG250, and WG300. Always verify the spline count and pilot bearing diameter against your transmission’s serial number before installation. For proper assembly, secure the shaft using a HEXAGON SCREW and ensure the HOUSING (part 4616301307) or HOUSING (part 4616301309) is free of debris to prevent premature wear.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4616101066 | TRANSMISSION HOUSING | Encloses and supports the input shaft assembly |
| 0636011118 | HEXAGON SCREW | Secures the input shaft bearing retainer |
| 4616301307 | HOUSING | Front housing section for WG65 series |
| 4616301309 | HOUSING | Rear housing section for WG65 series |
| 0636011038 | HEXAGON SCREW | Fastener for housing-to-transmission joint |
| 0636016015 | HEXAGON SCREW | High-torque bolt for input shaft flange |
| 0631306085 | CYLINDRICAL PIN | Alignment pin for housing dowel holes |
| 0634313118 | O-RING | Seals the input shaft bore against oil leaks |
| 0636304019 | SCREW PLUG | Closes the oil gallery access port |
| 0634801152 | SEALING RING | Prevents fluid bypass at the shaft exit |
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