Overview
The ZF 4661.042.002 2 WG 94 Powershift Transmission Assembly is a complete, factory-grade unit engineered for heavy-duty off-highway machinery. This assembly integrates the full clutch pack, planetary gear sets, and hydraulic control system into a single drop-in replacement. As the core power distribution module within the WG 94 Series, it manages torque flow between the engine and driveline under extreme load conditions. The SKU 4661.042.002 is specifically designed to restore OEM performance in wheel loaders, dozers, and graders. When installing this assembly, ensure the 4661101015: TRANSMISSION HOUSING is free of cracks and the 4661301024: HOUSING is properly aligned to prevent oil starvation.
Symptoms of Failure
- Delayed or harsh engagement: A worn 4661.042.002 unit causes a noticeable lag when shifting from neutral to forward or reverse, often accompanied by a jarring clunk.
- Erratic gear slipping under load: When the transmission assembly loses hydraulic pressure, the machine will momentarily lose power during uphill travel or heavy digging cycles.
- External oil seepage at the bell housing: Degraded seals within the assembly allow transmission fluid to weep past the 0631306174: CYLINDRICAL PIN interface, leaving visible drips on the undercarriage.
- Overheating during normal operation: Internal clutch pack wear generates excessive friction, causing the transmission temperature gauge to spike above 120°C within minutes of operation.
Technical Specifications
| Parameter | Value |
|---|---|
| OEM Part Number | 4661.042.002 |
| Series | WG 94 (2 WG 94) |
| Dry Weight | 185 kg (408 lbs) |
| Overall Length | 620 mm |
| Overall Width | 480 mm |
| Overall Height | 410 mm |
| Housing Material | High-grade cast iron (GGG-40) |
| Clutch Plate Material | Sintered bronze on steel |
| Max Input Torque | 1,200 Nm |
| OEM Reference | ZF 4661.042.002 |
Compatibility
This complete powershift assembly is engineered for the ZF WG 94 transmission family. It is a direct fit for the WG180, WG200, and WG210 models commonly found in 20-30 ton wheel loaders and articulated trucks. The unit also retrofits into select WG 92 series housings when paired with the correct 0769123894: TYPE PLATE for identification. Always verify the bell housing pattern matches your machine’s flywheel before installation.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4661101015 | TRANSMISSION HOUSING | Encloses the gear train and supports bearing journals |
| 4661301024 | HOUSING | Rear cover that seals the hydraulic valve body |
| 0631306174 | CYLINDRICAL PIN | Locates and aligns the housing halves during assembly |
| 0769123894 | TYPE PLATE | Serialized identification tag for the transmission |
| 0750100022 | SCREW PLUG | Seals the main pressure test port |
| 4660201008 | SCREW PLUG | Closes the oil drain passage in the sump |
| 0636100117 | SCREW PLUG | Blocks the cooler return port |
| 0501211384 | VALVE | Modulates clutch apply pressure |
| 0732042156 | COMPRESSION SPRING | Returns the valve spool to neutral position |
| 0636100820 | SCREW PLUG | Seals the accumulator charging port |
