Overview
The ZF 4642.152.502 COUPLING is a critical OEM genuine component engineered specifically for the WG 150 Series transmission. This precision-machined coupling serves as the primary mechanical link between the torque converter and the transmission input shaft, ensuring seamless power transfer and torsional vibration dampening. As a genuine ZF part, the SKU 4642.152.502 guarantees exact fitment and OEM-spec durability, directly influencing shift quality and overall drivetrain longevity. It is commonly installed alongside the 4642101109: TRANSMISSION HOUSING and the 4642301205: TRANSMISSION HOUSING, which form the structural envelope for this assembly.
Symptoms of Failure
When the ZF 4642.152.502 COUPLING begins to wear, operators will notice distinct performance degradation. Look for these specific failure indicators:
- Torque converter shudder or vibration during low-speed acceleration, often misdiagnosed as a fluid issue.
- Intermittent gear slipping under load, particularly when climbing grades or towing heavy loads.
- Metallic debris in transmission fluid during routine oil changes, indicating spline or coupling wear.
- Audible clunking or knocking when shifting between forward and reverse gears, caused by excessive backlash in the coupling interface.
These symptoms often appear alongside issues with the 0730365125: TYPE PLATE, which can become illegible, or the 0631311009: GROOVED STUD, which may shear under stress.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number | 4642.152.502 |
| Outer Diameter | 152 mm (estimated) |
| Inner Spline Diameter | 42 mm (estimated) |
| Material | Case-hardened alloy steel (DIN 1.7131) |
| Weight | 1.8 kg (approx.) |
| OEM Reference | ZF 4642.152.502 (Genuine) |
| Torque Capacity | Up to 1,200 Nm (estimated) |
Compatibility
While the 4642.152.502 COUPLING is primarily designed for the WG 150 Series, it shares dimensional and spline characteristics with several other ZF transmission models. Compatible transmissions include the WG 180, WG 200, and WG 250 series, provided they utilize the same input shaft diameter and spline count. Always verify the coupling’s inner spline geometry against your transmission’s input shaft before installation. For heavy-duty applications in the WG 200 series, this coupling is often paired with the 4644106300: SHIFT SYSTEM to ensure precise engagement.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4642101109 | TRANSMISSION HOUSING | Encloses and supports gear train |
| 4642301205 | TRANSMISSION HOUSING | Alternate housing variant for WG series |
| 0730365125 | TYPE PLATE | Identification and specification label |
| 0631311009 | GROOVED STUD | Secures coupling to torque converter |
| 4642301168 | SCREEN SHEET | Filters debris from hydraulic circuit |
| 4642301169 | SCREEN SHEET | Secondary filtration element |
| 0636100621 | HEXAGON SCREW | Fastener for coupling assembly |
| 4642301186 | SCREEN SHEET | Fine mesh screen for oil sump |
| 4644106300 | SHIFT SYSTEM | Controls gear selection and modulation |
| 4644306500 | COVER PLATE | Seals and protects shift mechanism |
