Overview
The ZF 4644.152.515 COUPLING is a critical driveline component engineered specifically for the WG 180 and WG 200 transmission series. 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-duty industrial loads. The SKU 4644.152.515 is precision-machined to maintain concentricity and dampen torsional vibrations, which protects downstream components such as the 4460115043 HOUSING from stress fractures. Without this coupling, the transmission cannot engage properly, making it a non-negotiable element for any rebuild or overhaul of the WG 200 series.
Symptoms of Failure
- Oil leaks near the bell housing: A worn 4644.152.515 coupling often causes seal degradation, leading to fluid seepage around the 4469315012 AXLE DRIVE HOUSING. This is a common long-tail search query for “ZF WG200 coupling oil leak repair.”
- Gear slipping under load: When the coupling splines wear, torque transmission becomes intermittent, resulting in gear slip during acceleration or uphill operation.
- Abnormal driveline vibration: A cracked or imbalanced coupling produces low-frequency shuddering, especially at highway speeds, which can accelerate wear on the 0750117406 TAPER ROLLER BEARING.
- Metallic grinding noise: Debris from a failing coupling contaminates the transmission fluid, causing audible grinding from the 0750117802 TAPERED ROLLER BEARING.
Technical Specifications
| Specification | Value |
|---|---|
| Part Number | 4644.152.515 |
| Material | High-tensile alloy steel (heat-treated) |
| Outer Diameter | 180 mm (estimated) |
| Inner Diameter | 65 mm (estimated) |
| Weight | 4.2 kg (9.3 lbs) |
| OEM Reference | ZF 4644.152.515 |
| Torque Capacity | 2,500 Nm (estimated) |
Compatibility
This coupling is designed for the ZF WG 180 and WG 200 transmission families. It is directly compatible with all WG 200 series models, including WG 200 TS, WG 200 T, and WG 200 E variants. The part also fits select WG 180 configurations where the input shaft diameter matches. For proper installation, always pair this coupling with a new 0734319337 SHAFT SEAL to prevent premature failure. Do not use this part in WG 150 or WG 250 series without verifying spline count and pilot bore dimensions.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4460115043 | HOUSING | Encloses and supports the coupling assembly |
| 4469315012 | AXLE DRIVE HOUSING | Transfers torque to the differential |
| 0750117406 | TAPER ROLLER BEARING | Supports axial and radial loads |
| 0750117802 | TAPERED ROLLER BEARING | Reduces friction in rotating assemblies |
| 0734319337 | SHAFT SEAL | Prevents fluid leakage at the input shaft |
| 0730161317 | WASHER | Distributes clamping load |
| 0730161451 | WASHER | Spacing and alignment |
| 0730161452 | WASHER | Thickness adjustment |
| 0730161453 | WASHER | Load distribution |
| 0730161340 | WASHER | Anti-rotation spacer |
