Overview
The ZF 4642.153.487 COUPLING is a critical driveline component engineered specifically for the WG 150 Series transmission. This OEM genuine part serves as the mechanical link between the engine output and the transmission input, ensuring precise torque transfer and rotational alignment. Positioned directly within the bell housing assembly, the coupling absorbs torsional vibrations and maintains smooth power delivery under heavy-duty industrial loads. The SKU 4642.153.487 is manufactured to ZF’s exacting tolerances, guaranteeing a direct fit without modification. When paired with a robust TRANSMISSION HOUSING (4642101114) or a TRANSMISSION HOUSING (4642301213), this coupling forms the backbone of the gearbox’s structural integrity.
Symptoms of Failure
- Audible Clunking or Knocking During Gear Engagement: Worn coupling splines or elastomeric elements produce a distinct metallic noise when shifting from neutral to drive, indicating excessive backlash.
- Vibration at Low RPM Under Load: A failing 4642.153.487 coupling cannot dampen engine harmonics, causing noticeable chassis vibration during acceleration from a standstill.
- Transmission Fluid Contamination: Cracks in the coupling body allow debris to enter the oil circuit, often detected during routine filter inspections as metallic particles.
- Intermittent Power Loss or Slipping: When the coupling loses its press-fit tolerance, torque transmission becomes inconsistent, mimicking clutch or gear slipping symptoms.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number | 4642.153.487 |
| Outer Diameter | 180 mm |
| Inner Diameter (Spline) | 45 mm |
| Overall Length | 95 mm |
| Material | Forged Steel with Nitride Coating |
| Weight | 2.8 kg |
| OEM Reference | ZF 4642.153.487 |
| Torque Capacity | 1,200 Nm |
Compatibility
This coupling is primarily designed for the ZF WG 150 Series, but its spline geometry and load rating also make it suitable for the WG 180 and WG 200 models when used with the correct housing adapters. It is a direct replacement for earlier WG 120 variants that share the same bell housing pattern. For proper installation, ensure the TYPE PLATE (0730365125) matches your transmission model, and secure the assembly using a GROOVED STUD (0631311009) to prevent axial movement. The coupling also interfaces with the shift system and oil screen components listed below.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4642101114 | TRANSMISSION HOUSING | Encloses and supports gear train assembly |
| 4642301213 | TRANSMISSION HOUSING | Alternate housing variant for WG series |
| 0730365125 | TYPE PLATE | Identification tag for transmission model |
| 0631311009 | GROOVED STUD | Secures coupling to input shaft |
| 4642301168 | SCREEN SHEET | Oil filtration mesh for sump |
| 4642301169 | SCREEN SHEET | Fine filtration screen for valve body |
| 0636100621 | HEXAGON SCREW | Fastener for housing cover |
| 4642301186 | SCREEN SHEET | High-flow oil strainer |
| 4644106300 | SHIFT SYSTEM | Hydraulic shift actuator assembly |
| 4644306500 | COVER PLATE | Seals coupling access port |
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