Overview
The ZF 4651.151.008 COUPLING is a critical OEM genuine component engineered specifically for the WG 100 and WG 110 transmission series. This precision-machined coupling serves as the primary torque transfer interface between the transmission output shaft and the driveline, ensuring smooth power delivery under heavy industrial loads. As a genuine ZF part, SKU 4651.151.008 guarantees exact fitment and metallurgical integrity, eliminating the risk of premature wear associated with aftermarket alternatives. This coupling is housed within the main transmission assembly, directly adjacent to the 4651101006: TRANSMISSION HOUSING, and works in concert with the 4651301034: HOUSING to maintain concentric alignment during high-torque operations.
Symptoms of Failure
When the ZF 4651.151.008 coupling begins to degrade, operators will notice distinct performance issues. Transmission gear slipping under load is the most common indicator, as worn splines or internal fractures prevent positive engagement. Vibration during acceleration often accompanies this failure, particularly at highway speeds or when climbing grades. Metallic debris in transmission fluid signals material fatigue within the coupling, while intermittent loss of power to the wheels suggests the coupling is no longer transmitting full torque. Left unaddressed, a failing coupling can damage the adjacent 0634303928: O-RING, leading to fluid contamination and further drivetrain degradation.
Technical Specifications
| Parameter | Specification |
|---|---|
| OEM Part Number | 4651.151.008 |
| Material | Case-hardened alloy steel (20MnCr5) |
| Outer Diameter | 98 mm |
| Inner Diameter | 42 mm |
| Overall Length | 85 mm |
| Weight | 0.95 kg |
| Spline Count | 24 internal / 24 external |
| Torque Capacity | 1,450 Nm |
| Operating Temperature Range | -40°C to +120°C |
| OEM Reference | ZF 4651.151.008 |
Compatibility
This genuine ZF coupling is designed for the WG 100 and WG 110 transmission series, commonly found in municipal trucks, refuse vehicles, and medium-duty construction equipment. It also cross-references to select WG 120 and WG 150 variants where the output shaft interface matches the 24-spline configuration. The part is not compatible with WG 180 or WG 200 series transmissions without modification to the 4651301013: HOUSING. Always verify spline count and shaft diameter against your specific transmission model before ordering.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4651101006 | TRANSMISSION HOUSING | Encloses and supports gear train assembly |
| 4651301034 | HOUSING | Intermediate housing for coupling alignment |
| 0634303928 | O-RING | Seals coupling-to-housing interface |
| 4651301013 | HOUSING | Rear housing for output shaft support |
| 4651301015 | SCREEN SHEET | Filters debris from lubrication oil |
| 4651301035 | SCREEN SHEET | Secondary filtration for hydraulic circuit |
| 0630361028 | SEALING CAP | Closes unused port openings |
| 4475280060 | SCREW PLUG | Secures drain/fill ports |
| 0634303312 | O-RING | Seals screw plug threads |
| 0630361063 | SEALING CAP | Protects sensor ports from contamination |
