Overview
The ZF 4646.152.457 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 under heavy industrial loads. Positioned within the bell housing assembly, the coupling absorbs torsional vibrations and compensates for minor misalignment during operation. The SKU 4646.152.457 is manufactured to ZF’s exacting tolerances, making it a direct replacement for worn units in off-highway vehicles, construction equipment, and material handling machinery.
Symptoms of Failure
- Transmission shudder during engagement – A worn coupling causes noticeable vibration or jerking when shifting from neutral to drive, often described as “ZF transmission shudder on acceleration.”
- Metallic clicking or clunking noises – As the coupling’s elastomeric elements degrade, you may hear distinct “clunking sounds from transmission bell housing” during gear changes or load reversal.
- Oil seepage near the bell housing – A failing coupling can compromise the seal interface, leading to “ZF WG series oil leak between engine and transmission” – a common long-tail search query.
- Reduced torque transfer efficiency – Operators report “transmission slipping under load” or sluggish performance, particularly when climbing grades or moving heavy payloads.
Technical Specifications
| Specification | Detail |
|---|---|
| Part Number | 4646.152.457 |
| OEM Reference | ZF 4646.152.457 |
| Material | High-tensile steel hub with reinforced elastomeric insert |
| Outer Diameter | ~180 mm (estimated) |
| Inner Diameter | ~65 mm (estimated) |
| Overall Length | ~95 mm (estimated) |
| Weight | ~2.8 kg (estimated) |
| Torque Capacity | Up to 1,200 Nm (estimated) |
| Operating Temperature | -20°C to +100°C |
Compatibility
This coupling is designed for ZF’s WG series powershift transmissions. Primary applications include the WG 250, WG 260, and WG 310 models. It may also be compatible with earlier WG 180 and WG 200 variants, provided the bell housing dimensions match. Always verify fitment by cross-referencing your transmission serial number with the OEM part 4646.152.457. For complete assembly, this coupling works in conjunction with the TRANSMISSION HOUSING (4646101029) and the HOUSING (4646301090), which enclose the coupling chamber. The COVER (4646301087) seals the assembly, while HEXAGON SCREW (0636015304) secures the coupling to the input shaft.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4646101029 | TRANSMISSION HOUSING | Main structural casing for gear train |
| 4646301090 | HOUSING | Secondary housing for coupling chamber |
| 4646301087 | COVER | Seals the coupling assembly |
| 0636015304 | HEXAGON SCREW | Fastener for coupling attachment |
| 0636101828 | CAP SCREW | Secures housing components |
| 4646301102 | COVER SHEET | Protective shim for housing |
| 4646301235 | COVER SHEET | Additional sealing layer |
| 0730365067 | TYPE PLATE | Identification tag for transmission |
| 0631311009 | GROOVED STUD | Alignment dowel for assembly |
| 0636101193 | CAP SCREW | Fastener for cover attachment |
