Overview
The ZF 4642.056.034 6 WG 150 Powershift Transmission Assembly | Complete Unit is a fully assembled, ready-to-install gearbox core designed for heavy-duty off-highway machinery. As a complete unit, it integrates the main housing, clutch packs, and hydraulic shift controls into a single, tested assembly. This SKU, 4642.056.034, serves as the primary power transfer module in the WG 150 series, converting engine torque into controlled wheel or driveline motion. It sits centrally within the driveline, directly coupling to the engine bellhousing and output driveline. For a full rebuild, this assembly must be paired with a new TRANSMISSION HOUSING to ensure structural integrity and proper alignment of internal components.
Symptoms of Failure
When the ZF 4642.056.034 assembly begins to fail, operators will notice distinct performance degradation. Common failure symptoms include:
- Delayed or harsh gear engagement: The transmission hesitates before shifting into forward or reverse, often accompanied by a loud clunk, indicating worn clutch discs or valve body issues.
- Internal oil leaks and low pressure: Hydraulic fluid seeps from the main case seams or output shaft seals, leading to sluggish operation and eventual overheating.
- Gear slipping under load: The transmission loses torque transfer during heavy pulling or climbing, causing the engine to rev without corresponding vehicle movement.
- Unusual whining or grinding noises: Metallic sounds from the gear train suggest bearing failure or gear tooth damage within the assembly.
Technical Specifications
| Specification | Value |
|---|---|
| Part Number / SKU | 4642.056.034 |
| Series | WG 150 (6-speed Powershift) |
| Overall Length (approx.) | 780 mm |
| Dry Weight (approx.) | 320 kg (705 lbs) |
| Housing Material | High-strength cast iron |
| OEM Reference | ZF 4642.056.034 |
| Input Torque Rating | 1,500 Nm (peak) |
| Fluid Capacity | 22 liters (approx.) |
Compatibility
This complete unit 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, provided the bellhousing and output flange match. The assembly directly replaces units in ZF 6 WG 150 powershift applications found in loaders, graders, and industrial tractors. Always verify the TYPE PLATE on your existing unit to confirm model fitment before ordering. During installation, secure the assembly using the correct GROOVED STUD for mounting to the engine block.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4642101109 | TRANSMISSION HOUSING | Main structural casing for gear train |
| 4642301205 | TRANSMISSION HOUSING | Alternative housing variant for WG 150 |
| 0730365125 | TYPE PLATE | Identification plate for serial number |
| 0631311009 | GROOVED STUD | Mounting fastener for bellhousing |
| 4642301168 | SCREEN SHEET | Oil filter screen for hydraulic circuit |
| 4642301169 | SCREEN SHEET | Secondary oil filter screen |
| 0636100621 | HEXAGON SCREW | Bolt for housing fastening |
| 4642301186 | SCREEN SHEET | Fine mesh screen for valve body |
| 4644106300 | SHIFT SYSTEM | Hydraulic shift control assembly |
| 4644306500 | COVER PLATE | Access cover for clutch pack |
