Overview
The ZF 4642.056.016 6 WG 150 Powershift Transmission Assembly represents a complete, factory-grade replacement unit engineered for heavy-duty off-highway applications. This fully assembled transmission integrates the planetary gear sets, clutch packs, and hydraulic control system into a single, ready-to-install package. As a core component of the WG 150 series, the SKU 4642.056.016 directly replaces worn or failed assemblies in wheel loaders, dozers, and material handlers. The unit sits as the primary power transfer module between the engine and the driveline, managing torque multiplication and speed reduction through six forward and three reverse gears. For maximum rebuild reliability, this assembly is often paired with a new TRANSMISSION HOUSING (4642101109) or the alternative TRANSMISSION HOUSING (4642301205) to ensure proper alignment of internal components.
Symptoms of Failure
- Delayed or harsh engagement when shifting between forward and reverse: Worn clutch discs or degraded seals within the 4642.056.016 assembly cause pressure loss, resulting in a noticeable lag or jarring shift. Operators often report a “clunk” sound during direction changes.
- Transmission overheating under normal load: Internal leakage past piston seals or a clogged oil circuit forces the unit to run 20-30°F hotter than specification, often triggering warning lights on the dashboard.
- Loss of power in higher gears (4th, 5th, 6th): Slipping in the planetary gear sets due to worn friction plates prevents the transmission from holding torque, causing the machine to lose speed on inclines or under load.
- Visible oil leaks from the bell housing or output flange area: Cracks in the housing or failed gaskets allow hydraulic fluid to escape, leaving puddles under the equipment and requiring frequent top-offs.
Technical Specifications
| Parameter | Specification |
|---|---|
| OEM Part Number | 4642.056.016 |
| Series | WG 150 (6 WG 150) |
| Assembly Type | Complete Powershift Transmission |
| Number of Speeds | 6 Forward / 3 Reverse |
| Dry Weight (approx.) | 385 kg (849 lbs) |
| Overall Length | 720 mm |
| Overall Width | 510 mm |
| Overall Height | 580 mm |
| Housing Material | High-Strength Cast Iron |
| Clutch Material | Sintered Bronze / Paper Composite |
| Max Input Torque | 1,500 Nm |
| OEM Reference | ZF 6 WG 150 |
Compatibility
This complete unit is specifically designed for the ZF WG 150 series, including the 6 WG 150 variant. Based on the modular architecture of ZF powershift transmissions, the 4642.056.016 assembly is also compatible with the WG 180 and WG 200 series when used with appropriate adapters, though direct fitment is confirmed for WG 150 applications. The unit shares hydraulic and mechanical interfaces with the WG 100 and WG 120 series, but internal gear ratios differ. Always verify the identification tag; if the original TYPE PLATE (0730365125) is missing or damaged, cross-reference the GROOVED STUD (0631311009) pattern on the housing to confirm series compatibility.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4642101109 | TRANSMISSION HOUSING | Main structural casing for gear and shaft support |
| 4642301205 | TRANSMISSION HOUSING | Alternative housing variant for specific WG 150 builds |
| 0730365125 | TYPE PLATE | Identification tag with serial and model data |
| 0631311009 | GROOVED STUD | Alignment dowel for housing-to-engine mounting |
| 4642301168 | SCREEN SHEET | Fine mesh filter for hydraulic oil circuit |
| 4642301169 | SCREEN SHEET | Secondary filter screen for return line |
| 0636100621 | HEXAGON SCREW | Fastener for securing cover plates and flanges |
| 4642301186 | SCREEN SHEET | High-flow screen for clutch feed passages |
| 4644106300 | SHIFT SYSTEM | Hydraulic valve body and solenoid assembly |
| 4644306500 | COVER PLATE | Sealing plate for access port on transmission sump |
