Overview
The ZF 4642.056.040 6 WG 150 Powershift Transmission Assembly is a complete, factory-matched unit designed for heavy-duty off-highway applications. This assembly integrates the torque converter, planetary gear sets, and hydraulic clutch packs into a single, ready-to-install package. As a core component of the WG 150 series, the SKU 4642.056.040 replaces the entire gear train and shift mechanism, restoring full power flow from the engine to the driveline. It is typically mounted between the engine flywheel housing and the final drive, serving as the primary power modulation and gear reduction system.
Symptoms of Failure
- Delayed or harsh engagement: When the 4642.056.040 assembly wears, internal clutch pack clearances increase, causing a noticeable lag when shifting from neutral to forward or reverse, followed by a jarring engagement.
- Transmission overheating under load: Worn seals or scored clutch plates within the unit generate excessive friction, leading to fluid temperatures exceeding 120°C during normal operation.
- Intermittent gear slippage: A failing assembly will cause the machine to lose power under heavy load, with the engine revving but vehicle speed dropping, particularly in higher gear ranges.
- Metallic debris in the oil pan: Internal bearing or gear failure produces visible metal particles in the hydraulic fluid, often accompanied by a whining or grinding noise from the transmission housing.
Technical Specifications
| Parameter | Value |
|---|---|
| OEM Part Number | 4642.056.040 |
| Assembly Type | Complete Powershift Unit |
| Dry Weight (approx.) | 185 kg (408 lbs) |
| Overall Length | 620 mm |
| Overall Width | 480 mm |
| Overall Height | 510 mm |
| Housing Material | High-grade cast iron (GGG-40) |
| Max Input Torque | 1,500 Nm |
| OEM Reference | ZF 6 WG 150 |
Compatibility
This complete assembly is specifically engineered for the ZF WG 150 series. It is directly compatible with models including the 6 WG 150, 6 WG 160, and 6 WG 180. The unit also fits select WG 200 variants when used with the correct TRANSMISSION HOUSING (4642101109) or the alternative TRANSMISSION HOUSING (4642301205). For proper identification, ensure the TYPE PLATE (0730365125) matches your original unit. Secure the assembly using the GROOVED STUD (0631311009) at the mounting flange.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4642101109 | TRANSMISSION HOUSING | Main structural casing for the gear train |
| 4642301205 | TRANSMISSION HOUSING | Alternate housing variant for WG 150 series |
| 0730365125 | TYPE PLATE | Identification plate with serial number |
| 0631311009 | GROOVED STUD | Mounting stud for housing alignment |
| 4642301168 | SCREEN SHEET | Fine mesh filter for hydraulic circuit |
| 4642301169 | SCREEN SHEET | Secondary filter element for oil return |
| 0636100621 | HEXAGON SCREW | Fastener for cover plate attachment |
| 4642301186 | SCREEN SHEET | High-flow filter for clutch cooling |
| 4644106300 | SHIFT SYSTEM | Hydraulic valve body for gear selection |
| 4644306500 | COVER PLATE | Sealing plate for the shift system access |
