Overview
The ZF 4642.152.498 COUPLING is a critical driveline component engineered specifically for the WG 150 Series transmission. This OEM genuine part serves as the primary mechanical link between the engine output and the transmission input shaft, ensuring precise torque transfer and rotational alignment. Located within the bell housing assembly, the coupling absorbs torsional vibrations and compensates for minor misalignment, protecting both the transmission and the power source from undue stress. The SKU 4642.152.498 is manufactured to ZF’s exacting tolerances, guaranteeing a direct fit and long service life in heavy-duty industrial applications.
Symptoms of Failure
- Transmission gear slipping under load: When the coupling wears, it can no longer maintain a positive engagement, causing the transmission to slip out of gear during acceleration or under heavy torque demands.
- Metallic grinding or clunking noises: A failing coupling often produces audible grinding, rattling, or a distinct clunk when shifting between forward and reverse, indicating worn splines or fractured coupling teeth.
- Oil leaks near the bell housing: Degraded coupling seals allow transmission fluid to escape, leaving puddles under the vehicle and reducing hydraulic pressure within the system.
- Vibration during operation: Excessive play in the coupling causes driveline vibration that intensifies with speed, often felt through the chassis or shift lever.
Technical Specifications
| Specification | Value |
|---|---|
| Part Number (SKU) | 4642.152.498 |
| Material | Hardened alloy steel with nitrided surface |
| Outer Diameter | 152 mm |
| Overall Length | 98 mm |
| Spline Count | 24 internal / 24 external |
| Weight | 2.4 kg (5.3 lbs) |
| OEM Reference | ZF 4642.152.498 |
| Torque Capacity | 1,200 Nm (885 lb-ft) |
Compatibility
This coupling is primarily designed for the WG 150 Series transmission, but it also fits select models in the WG 180 and WG 200 families due to shared spline geometry and housing dimensions. It is compatible with ZF WG150, WG180, and WG200 transmissions produced after 2010. For proper installation, this part works in conjunction with the 4642101109 TRANSMISSION HOUSING and the 4642301205 TRANSMISSION HOUSING, which provide the structural mounting points. Additionally, the 0730365125 TYPE PLATE must be affixed for correct identification, and the 0631311009 GROOVED STUD secures the coupling to the flywheel assembly.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4642101109 | TRANSMISSION HOUSING | Encloses and supports transmission internals |
| 4642301205 | TRANSMISSION HOUSING | Alternate housing for WG series |
| 0730365125 | TYPE PLATE | Identification plate for transmission model |
| 0631311009 | GROOVED STUD | Secures coupling to flywheel |
| 4642301168 | SCREEN SHEET | Filters debris from oil flow |
| 4642301169 | SCREEN SHEET | Secondary oil filtration screen |
| 0636100621 | HEXAGON SCREW | Fastener for housing assembly |
| 4642301186 | SCREEN SHEET | Fine mesh screen for hydraulic circuit |
| 4644106300 | SHIFT SYSTEM | Controls gear selection mechanism |
| 4644306500 | COVER PLATE | Seals access opening on housing |
