Overview
The ZF 4646.153.465 COUPLING is a critical driveline component engineered specifically for the WG 250, WG 260, and WG 310 series transmissions. This OEM genuine part serves as the primary torque transfer interface between the engine output and the transmission input shaft, ensuring smooth power delivery and dampening torsional vibrations. The SKU 4646.153.465 is precision-machined to maintain exact alignment within the clutch housing assembly, directly interfacing with the TRANSMISSION HOUSING to form a sealed, high-torque connection. Without this coupling, the transmission cannot engage the gear train, making it a non-negotiable element for any rebuild or overhaul of these heavy-duty ZF units.
Symptoms of Failure
- Torque converter shudder or vibration during acceleration: A worn 4646.153.465 coupling loses its dampening capacity, transmitting engine harmonics directly into the transmission, causing noticeable shudder at low RPM.
- Transmission fluid contamination with metallic debris: As the coupling splines wear, fine metal particles enter the hydraulic circuit, often detected during routine oil analysis or when draining the pan.
- Intermittent gear slipping under load: When the coupling hub becomes loose or cracked, it cannot maintain consistent engagement, leading to momentary power loss, especially when climbing grades or hauling heavy loads.
- Audible clunking when shifting between forward and reverse: Excessive play in the coupling joint produces a distinct metallic impact noise, indicating immediate replacement is required to prevent damage to the COVER assembly.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number (SKU) | 4646.153.465 |
| OEM Reference | ZF 4646.153.465 |
| Material | High-strength alloy steel (induction hardened) |
| Outer Diameter | 180 mm (approx.) |
| Inner Spline Diameter | 45 mm (approx.) |
| Overall Length | 95 mm |
| Weight | 2.8 kg |
| Torque Capacity | Up to 2,500 Nm |
| Hardness Rating | HRC 48-52 |
Compatibility
This coupling is designed for the ZF WG series powershift transmissions. It is a direct fit for the following models: WG 250, WG 260, WG 261, WG 310, and WG 311. It also applies to earlier variants such as the WG 180 and WG 200 when used in conjunction with the appropriate 螺栓 (bolt kit) and 螺栓 (fastener set) for secure mounting. Always verify the spline count and pilot bore diameter against your specific transmission serial number before installation.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4646101173 | TRANSMISSION HOUSING | Main structural casing that encloses the gear train and coupling assembly. |
| 4646301349 | COVER | Seals the front of the transmission and supports the input shaft bearing. |
| 0636115293 | 螺栓 | High-tensile bolt used to secure the coupling to the flywheel. |
| 0736300232 | 螺栓 | Mounting bolt for the cover-to-housing interface. |
| 4475280208 | SCREW PLUG | Seals hydraulic test ports and drain passages in the housing. |
| 0634316523 | O-RING | Provides a leak-proof seal between the coupling hub and shaft. |
| 0630361026 | SEALING CAP | Protects the coupling spline end from debris ingress. |
| 0501214611 | 齿轮泵 | Hydraulic pump that supplies lubrication and clutch actuation pressure. |
| 0634313945 | O形圈 | Secondary seal for the pump-to-housing interface. |
| 0501322532 | TEMPERATURE SENSOR | Monitors transmission fluid temperature to prevent overheating. |
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