Overview
The ZF 4642.054.003 4 WG 150 Powershift Transmission Assembly is a complete, drop-in replacement unit designed for heavy-duty off-highway applications. This assembly integrates the full clutch pack, planetary gear sets, and hydraulic control system into a single, pre-assembled housing. As the core power transfer module, it sits between the torque converter and the final drive, managing all forward and reverse gear ratios. The SKU 4642.054.003 is a direct OEM-specification unit, ensuring precise fitment and original performance characteristics for your WG 150 series transmission.
Symptoms of Failure
- Erratic shifting or gear slippage under load: When the internal clutch packs or sprag clutches wear, the transmission may hesitate or slip when shifting from forward to reverse, particularly under heavy torque demands.
- Internal hydraulic pressure loss: A failing assembly often causes low system pressure, leading to delayed engagement or a complete loss of drive in one or more gears.
- Metallic debris in the oil pan: Worn bearings or planetary gears generate fine metal particles, which can be detected during routine oil changes and indicate imminent internal failure.
- Excessive operating temperature: A worn 4 WG 150 unit creates internal friction, causing the transmission fluid to overheat rapidly even under normal load cycles.
Technical Specifications
| Parameter | Specification |
|---|---|
| Part Number | 4642.054.003 |
| Assembly Type | Complete Powershift Transmission Unit |
| Dry Weight | Approx. 185 kg (408 lbs) |
| Overall Length | 620 mm |
| Overall Width | 480 mm |
| Overall Height | 510 mm |
| Housing Material | High-strength cast iron |
| OEM Reference | ZF 4 WG 150 |
| Fluid Capacity | 18.5 liters (with torque converter) |
Compatibility
This complete assembly is engineered for the ZF WG 150 series. It is also compatible with the WG 180 and WG 200 series when used with the appropriate adapter kits. The unit directly replaces earlier 4 WG 150 variants and is backward-compatible with certain WG 120 models that share the same bellhousing pattern. For specific vehicle fitment, always verify the transmission serial number against the original equipment manufacturer’s parts list.
During installation, ensure the TRANSMISSION HOUSING (4642101108) and the TRANSMISSION HOUSING (4642301208) are inspected for cracks or warpage. The TYPE PLATE (0730365125) must be transferred to the new unit for proper identification. Additionally, the GROOVED STUD (0631311009) should be replaced to ensure correct torque retention on the main case.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4642101108 | TRANSMISSION HOUSING | Main structural case for gear train |
| 4642301208 | TRANSMISSION HOUSING | Secondary housing for clutch pack |
| 0730365125 | TYPE PLATE | Identification and rating plate |
| 0631311009 | GROOVED STUD | Fastener for housing alignment |
| 4642301168 | SCREEN SHEET | Oil filter mesh for hydraulic circuit |
| 4642301169 | SCREEN SHEET | Secondary oil filtration screen |
| 0636100621 | HEXAGON SCREW | Mounting bolt for cover plates |
| 0630361029 | SEALING CAP | Hydraulic port seal |
| 4642306254 | ADAPTER | Interface for torque converter |
| 0634303340 | O-RING | Hydraulic seal between housings |
Authorized ZF Distributor
We are a certified supplier of genuine ZF components.
