Overview
The ZF 4642.056.020 6 WG 150 Powershift Transmission Assembly | Complete Unit is a fully assembled, ready-to-install core component designed for heavy-duty industrial and off-highway applications. This complete unit integrates the planetary gear sets, clutch packs, and hydraulic control system within a robust housing, serving as the central power transfer module for ZF’s WG 150 series. The SKU 4642.056.020 identifies this as a factory-matched assembly, ensuring precise gear engagement and torque distribution. It mounts directly to the engine bellhousing and connects to the driveline, managing load shifts under high stress. For structural integrity, this unit is often paired with the TRANSMISSION HOUSING (4642101047) and the TRANSMISSION HOUSING (4642301207), which provide the sealed enclosure for internal components.
Symptoms of Failure
- Delayed or harsh gear engagement: Worn clutch discs or hydraulic seal degradation inside the 4642.056.020 assembly cause hesitation or jarring shifts, especially under load.
- Internal oil leaks and fluid loss: Cracks in the housing or failed gaskets lead to visible drips from the transmission case, reducing lubrication and cooling efficiency.
- Gear slipping under torque: A failing powershift unit cannot maintain clutch pressure, resulting in RPM flare without corresponding vehicle speed increase during acceleration.
- Unusual whining or grinding noises: Bearing wear or planetary gear damage within the assembly produces metallic sounds, particularly in neutral or low-range operation.
Technical Specifications
| Parameter | Specification |
|---|---|
| Part Number | 4642.056.020 |
| Assembly Type | Complete Powershift Unit (6-speed) |
| Series | WG 150 |
| Dry Weight (approx.) | 185 kg (408 lbs) |
| Overall Length | 620 mm |
| Overall Width | 480 mm |
| Overall Height | 510 mm |
| Housing Material | Cast Iron (GGG-40) |
| OEM Reference | ZF 6 WG 150 |
| Max Input Torque | 1,500 Nm |
| Fluid Capacity | 22 liters (approx.) |
Compatibility
This 4642.056.020 assembly is engineered specifically for the ZF WG 150 transmission series. It is also compatible with select variants in the WG 180 and WG 200 families that share the same bellhousing pattern and hydraulic interface, though internal gear ratios may differ. The unit integrates with the TYPE PLATE (0730365067) for identification and the GROOVED STUD (0631311009) for secure mounting. It is commonly used in agricultural tractors, wheel loaders, and industrial forklifts requiring a 6-speed powershift configuration.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4642101047 | TRANSMISSION HOUSING | Main structural casing for gear sets |
| 4642301207 | TRANSMISSION HOUSING | Secondary housing for clutch pack |
| 0730365067 | TYPE PLATE | Identification tag for transmission model |
| 0631311009 | GROOVED STUD | Fastener for housing alignment |
| 4642301168 | SCREEN SHEET | Oil filter mesh for debris protection |
| 4642301169 | SCREEN SHEET | Secondary oil filtration element |
| 0636100621 | HEXAGON SCREW | Mounting bolt for cover plates |
| 4642301186 | SCREEN SHEET | Fine mesh screen for valve body |
| 4644106300 | SHIFT SYSTEM | Hydraulic control module for gear selection |
| 4644306500 | COVER PLATE | Sealing plate for access port |
