Overview
The ZF 4646.103.457 OUTPUT assembly is a precision-engineered OEM sub-assembly designed for the WG 250, WG 260, and WG 310 series transmissions. This component serves as the primary output flange and hub interface, transferring rotational torque from the planetary gear set to the driveline. Positioned at the rear of the transmission housing, it ensures concentric alignment and load distribution under high-stress conditions. The SKU 4646.103.457 is a direct replacement unit that restores factory-specified clearance and prevents premature wear on adjacent components. When installing this output sub-assembly, always replace the 0634316523: O-RING to maintain a proper hydraulic seal, and secure the assembly using the 0636115293: 螺栓 and 0736300232: 螺栓 fasteners to the specified torque values.
Symptoms of Failure
- Oil seepage around the output shaft seal: A worn output sub-assembly often causes transmission fluid to leak past the rear seal, leaving puddles under the vehicle and reducing hydraulic pressure.
- Vibration or driveline shudder during acceleration: Excessive play in the output hub leads to imbalance, creating noticeable shaking that worsens under load.
- Intermittent gear engagement or delayed shifting: Misalignment from a failing output flange can disrupt the governor pressure signal, causing erratic shift patterns in WG series transmissions.
- Metallic debris in the transmission pan: Spalling or fretting on the output splines generates fine metal particles, indicating imminent failure of the sub-assembly.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number | 4646.103.457 |
| OEM Reference | ZF 4646.103.457 |
| Material | Forged alloy steel with induction-hardened splines |
| Overall Diameter | 180 mm (7.09 in) |
| Overall Length | 95 mm (3.74 in) |
| Spline Count | 24 internal splines |
| Weight | 2.8 kg (6.17 lbs) |
| Seal Surface Finish | Ra 0.4 µm |
Compatibility
This output sub-assembly is engineered for the ZF WG series powershift transmissions. It is directly compatible with the WG 250, WG 260, and WG 310 models. Additionally, it fits the WG 180, WG 200, and WG 211 series when used with the correct adapter hardware. The part also serves as a service replacement for the WG 311 series. For installations on WG 260 and WG 310 units, verify that the 4475280208: SCREW PLUG is torqued to 45 Nm to prevent pressure loss in the lubrication circuit.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 0636115293 | 螺栓 | Mounting bolt for output flange retention |
| 0736300232 | 螺栓 | Secondary fastener for housing attachment |
| 4475280208 | SCREW PLUG | Hydraulic circuit sealing plug |
| 0634316523 | O-RING | Seal between output hub and housing |
| 0630361026 | SEALING CAP | Protective cap for output shaft during storage |
| 0501214611 | 齿轮泵 | Gear pump supplying lubrication to output area |
| 0634313945 | O形圈 | Secondary seal for pump housing interface |
| 0501322532 | TEMPERATURE SENSOR | Monitors output bearing temperature |
| 0634313366 | O-RING | Seal for temperature sensor port |
| 4646230008 | DIAPHRAGM | Modulator diaphragm for shift pressure control |
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