Overview
This genuine ZF 4642.056.033 6 WG 150 Powershift Transmission Assembly is a complete, factory-built unit designed for heavy-duty off-highway applications. As a core component of the WG 150 series, this assembly integrates the torque converter, planetary gear sets, and hydraulic control system into a single, ready-to-install package. The SKU 4642.056.033 represents the latest revision of this transmission, ensuring compatibility with current drivetrain configurations. It is engineered to deliver precise power modulation under extreme loads, making it essential for wheel loaders, graders, and material handlers that require reliable forward-reverse shuttle operations.
Symptoms of Failure
When this assembly begins to degrade, operators will notice distinct performance issues. Look for these specific failure indicators:
- Delayed or harsh engagement – A noticeable lag when shifting from neutral to forward or reverse, often accompanied by a jarring clunk, indicating worn clutch packs or valve body degradation.
- Progressive oil leaks at the PTO housing – Hydraulic fluid seeping from the rear seal or converter housing, typically caused by seal fatigue or cracked casting under thermal stress.
- Intermittent gear slipping under load – The transmission momentarily loses torque during uphill travel or when the bucket is fully loaded, pointing to worn planetary gears or failing sprag clutches.
- Overheating with low hydraulic pressure – The transmission temperature rises above 120°C while the pressure gauge reads below 18 bar, often due to internal debris clogging the filter or a failing charge pump.
Technical Specifications
| Parameter | Specification |
|---|---|
| OEM Part Number | 4642.056.033 |
| Series | WG 150 (6-speed powershift) |
| Dry Weight | 385 kg (849 lbs) |
| Overall Length | 720 mm |
| Overall Width | 510 mm |
| Overall Height | 580 mm |
| Housing Material | High-strength cast iron (GGG-40) |
| Max Input Torque | 1,500 Nm |
| Hydraulic Pressure Range | 18–22 bar |
| Oil Capacity | 28 liters (ZF TE-ML 03 fluid) |
Compatibility
This complete unit is specifically engineered for the ZF WG 150 transmission family. It is a direct replacement for earlier 4642.056.xxx variants. While primarily designed for the WG 150, the mounting flange and input spline pattern are shared with the following ZF models:
- ZF WG 150 (all sub-variants, including 6 WG 150 and 4 WG 150)
- ZF WG 180 (limited compatibility—requires verification of bellhousing bolt pattern)
- ZF WG 200 (not a direct fit; adapter plate required for torque converter housing)
- ZF Ergopower 3 (only when used with specific OEM adapters for wheel loaders)
Always cross-reference your existing transmission’s serial number with the 4642.056.033 configuration. This assembly is not backward-compatible with pre-2010 WG 150 units without updating the valve body harness.
