Overview
The ZF 4642.056.039 6 WG 150 Powershift Transmission Assembly | Complete Unit is a fully assembled drop-in solution designed for heavy-duty off-highway machinery. This complete unit integrates the planetary gear sets, clutch packs, and hydraulic control system into a single, pre-tested assembly. As a core component of the WG 150 Series, it replaces the need for piecemeal repairs, ensuring immediate operational readiness. The SKU 4642.056.039 is the direct OEM reference for this complete assembly, which mounts directly to the TRANSMISSION HOUSING to form the main structural backbone of the drivetrain.
Symptoms of Failure
When the ZF 4642.056.039 assembly begins to degrade, operators will notice distinct performance issues. Look for these specific failure symptoms to diagnose a failing unit:
- Erratic gear engagement and slipping under load: The transmission hesitates or fails to hold a gear when the machine is under heavy torque, often accompanied by a burning clutch smell.
- External oil leaks from the main housing seam: Hydraulic fluid seeps from the mating surface between the assembly and the TRANSMISSION HOUSING, indicating a compromised seal or cracked casing.
- Delayed forward/reverse shuttle shift: A noticeable lag of 2-3 seconds when switching directions, pointing to worn clutch pistons or valve body contamination within the assembly.
- Unusual whining or grinding noises: High-pitched sounds from the gear train, often linked to bearing failure or debris in the hydraulic circuit.
Technical Specifications
| Specification | Detail |
|---|---|
| Part Number / SKU | 4642.056.039 |
| Assembly Type | Complete Powershift Unit (6 WG 150) |
| Dry Weight (Estimated) | 185 kg (408 lbs) |
| Overall Length | 620 mm |
| Overall Width | 480 mm |
| Overall Height | 510 mm |
| Primary Material | High-Grade Cast Iron / Steel Alloy |
| OEM Reference | ZF 4642.056.039 |
| Mounting Hardware | Requires GROOVED STUD (sold separately) |
Compatibility
This complete unit is engineered specifically for the ZF WG 150 Series transmission family. It is a direct fit for models including the WG 150, WG 180, and WG 200 series, commonly found in telehandlers, wheel loaders, and industrial forklifts. The assembly is designed to interface with the TYPE PLATE for proper identification and requires the GROOVED STUD for secure mounting to the bell housing. Always verify your transmission serial number against the WG 150 series range before ordering.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4642101109 | TRANSMISSION HOUSING | Main structural casing for the gear train |
| 4642301205 | TRANSMISSION HOUSING | Alternate housing variant for specific models |
| 0730365125 | TYPE PLATE | Identification tag for transmission specs |
| 0631311009 | GROOVED STUD | Mounting fastener for assembly alignment |
| 4642301168 | SCREEN SHEET | Fine mesh filter for hydraulic fluid |
| 4642301169 | SCREEN SHEET | Secondary filter element for oil circuit |
| 0636100621 | HEXAGON SCREW | Standard bolt for cover plate retention |
| 4642301186 | SCREEN SHEET | Large-area filter for sump protection |
| 4644106300 | SHIFT SYSTEM | Hydraulic valve assembly for gear selection |
| 4644306500 | COVER PLATE | Sealing plate for access port |
