Overview
The ZF 4642.054.206 4 WG 150 Powershift Transmission Assembly is a complete, factory-matched unit designed for heavy-duty off-highway machinery. This fully assembled gearbox integrates the planetary gear sets, clutch packs, and hydraulic control system into a single, ready-to-install package. As the core of the WG 150 series, this assembly manages torque distribution across four forward and reverse speeds, ensuring smooth power shifts under extreme loads. The SKU 4642.054.206 is a direct OEM replacement, eliminating the need for partial rebuilds. For a secure installation, pair this unit with a TRANSMISSION HOUSING (4642101117) to protect the internal components from debris and stress.
Symptoms of Failure
- Delayed or harsh engagement: When the 4642.054.206 assembly wears, you may notice a lag between shifting and actual gear engagement, often accompanied by a jarring clunk. This indicates worn clutch discs or hydraulic pressure loss.
- Oil leaks near the bell housing: A common failure point is seal degradation around the main shaft. Look for puddles of ATF under the vehicle, signaling that the complete unit requires replacement to prevent total lubrication failure.
- Gear slipping under load: If the transmission unexpectedly drops out of gear while climbing or hauling, the internal torque converter or planetary carrier within this assembly has likely failed. This symptom often worsens with heat.
- Whining or grinding noises: A high-pitched whine during acceleration points to worn bearings or gear teeth inside the 4642.054.206. Immediate replacement is critical to avoid catastrophic casing damage.
Technical Specifications
| Specification | Value |
|---|---|
| OEM Part Number | 4642.054.206 |
| Series | WG 150 |
| Assembly Type | Complete Powershift Unit |
| Dry Weight (approx.) | 185 kg (408 lbs) |
| Housing Material | Cast Iron (GGG-40) |
| Overall Length | 620 mm |
| Overall Width | 480 mm |
| Overall Height | 510 mm |
| Fluid Capacity | 12.5 liters (ATF Dexron III) |
| OEM Reference | ZF 4 WG 150 |
Compatibility
This complete unit is engineered specifically for the ZF WG 150 series transmissions. It is directly compatible with models including the WG 150, WG 151, and WG 152 found in loaders, graders, and compactors. While it shares mounting patterns with the WG 180 and WG 200 series, internal gear ratios differ; always verify your transmission tag. When replacing the assembly, also inspect the TRANSMISSION HOUSING (4642301217) for cracks, and ensure the TYPE PLATE (0730365125) is transferred to the new unit for accurate identification. Secure the assembly using a GROOVED STUD (0631311009) to maintain proper torque alignment.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4642101117 | TRANSMISSION HOUSING | Encloses and supports the gear train |
| 4642301217 | TRANSMISSION HOUSING | Alternate housing variant for WG 150 |
| 0730365125 | TYPE PLATE | Identification plate with serial number |
| 0631311009 | GROOVED STUD | Locating pin for housing alignment |
| 4642301168 | SCREEN SHEET | Fine mesh filter for hydraulic fluid |
| 4642301169 | SCREEN SHEET | Coarse mesh pre-filter |
| 0636100621 | HEXAGON SCREW | Fastener for housing cover |
| 0630361029 | SEALING CAP | Plugs unused hydraulic ports |
| 4642306254 | ADAPTER | Converts input flange pattern |
| 0634303340 | O-RING | Seals housing joint surfaces |
