Overview
The ZF 4646.103.035 OUTPUT – WG 250/WG 260/WG 310 Series | OEM Sub-Assembly is a precision-engineered output component designed for the rear power take-off (PTO) housing of select ZF WG-series automatic transmissions. This sub-assembly serves as the critical interface between the transmission’s internal gear train and the vehicle’s driveline, ensuring torque is transferred smoothly and reliably. As a genuine OEM-grade unit, the SKU 4646.103.035 replaces worn factory parts without modification, restoring original performance in construction, municipal, and heavy-duty truck applications. The assembly integrates directly with the output shaft housing and must be installed using the correct 0636115293: 螺栓 and 0736300232: 螺栓 to maintain proper clamping force and alignment.
Symptoms of Failure
- Oil leaks around the output flange: A worn 4646.103.035 sub-assembly often causes transmission fluid to weep from the rear seal area, leaving puddles under the vehicle after extended operation.
- Vibration during gear engagement: When this output component loses its bearing preload, drivers report a pronounced shudder or low-frequency hum when shifting from neutral to drive or reverse.
- Intermittent gear slipping under load: As the sub-assembly degrades, torque transfer becomes inconsistent, leading to momentary loss of power during uphill climbs or heavy hauling.
- Metal debris in transmission fluid: Advanced wear on the output housing can shed fine metallic particles, which may be detected during routine fluid changes or filter inspections.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number (SKU) | 4646.103.035 |
| OEM Reference | ZF 4646.103.035 |
| Material | High-strength cast iron with hardened steel inserts |
| Weight | 4.2 kg (9.3 lbs) |
| Overall Length | 185 mm |
| Flange Diameter | 120 mm |
| Bolt Hole Pattern | 6 x M12 on 100 mm PCD |
| Seal Surface Finish | Ra 0.8 µm |
| Operating Temperature Range | -40°C to +120°C |
Compatibility
This output sub-assembly is engineered for the ZF WG 250, WG 260, and WG 310 series transmissions, which are commonly found in mid-range to heavy-duty commercial vehicles. It also fits the closely related WG 261 and WG 311 variants. While the part is not directly compatible with the WG 180 or WG 200 series without adapter modifications, it serves as the direct replacement for all WG 250/260/310 platforms produced after 2005. During installation, ensure the 4475280208: SCREW PLUG is torqued to specification to prevent fluid bypass, and always replace the 0634316523: O-RING to guarantee a leak-free seal.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 0636115293 | 螺栓 | Secures output housing to transmission case |
| 0736300232 | 螺栓 | Fastens flange adapter to output shaft |
| 4475280208 | SCREW PLUG | Seals oil gallery in output housing |
| 0634316523 | O-RING | Prevents fluid leaks between sub-assembly and case |
| 0630361026 | SEALING CAP | Covers unused PTO port on output housing |
| 0501214611 | 齿轮泵 | Provides hydraulic pressure for clutch actuation |
| 0634313945 | O形圈 | Seals pump-to-housing interface |
| 0501322534 | TEMPERATURE SENSOR | Monitors transmission fluid temperature |
| 0634313366 | O-RING | Seals temperature sensor port |
| 4646130044 | ENGINE CONNECTION | Links transmission to engine bellhousing |
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