Overview
The ZF 4661.042.010 2 WG 94 Powershift Transmission Assembly is a complete, ready-to-install unit designed for heavy-duty off-highway applications. This assembly integrates the clutch packs, planetary gearsets, and hydraulic control components into a single, pre-assembled module. As a core element of the WG 94 Series, it manages torque distribution and speed changes under load. The SKU 4661.042.010 is a direct replacement for worn or failed assemblies, ensuring minimal downtime for wheel loaders, dozers, and graders. This unit interfaces directly with the TRANSMISSION HOUSING and the HOUSING II to form the complete gearbox casing.
Symptoms of Failure
- Erratic shifting or gear slippage under load: When the internal clutch packs or seals degrade, the transmission fails to maintain hydraulic pressure, causing the machine to lose power during digging or pushing operations.
- Delayed engagement when shifting from neutral to forward/reverse: Worn valve bodies or piston seals within the assembly create a lag of several seconds before the transmission responds to gear selection.
- External oil leaks at the housing joint: Cracks or warpage in the assembly body can cause transmission fluid to seep out, often visible near the mating surface with the CYLINDRICAL PIN alignment points.
- Unusual whining or grinding noises during operation: Bearing wear or debris contamination inside the assembly produces metallic sounds that intensify with engine RPM.
Technical Specifications
| Specification | Value |
|---|---|
| Part Number / SKU | 4661.042.010 |
| Assembly Type | Complete Powershift Unit (2 WG 94) |
| Dry Weight (approx.) | 185 kg (408 lbs) |
| Housing Material | High-strength cast iron (GGG-40) |
| Overall Length | 620 mm |
| Overall Width | 480 mm |
| Overall Height | 410 mm |
| OEM Reference | ZF 4661.042.010 / 2 WG 94 |
| Seal Type | Viton (FKM) O-rings |
| Bolt Torque (housing) | 120 Nm ± 10% |
Compatibility
This assembly is engineered for the ZF WG 94 Series of powershift transmissions. It is a direct fit for models including the WG180, WG200, and WG220, which are commonly used in 5–8 ton wheel loaders and telescopic handlers. The unit also supports the WG 94-2 variant found in certain agricultural tractors. Always verify the transmission serial number against the TYPE PLATE before installation to ensure correct hydraulic flow matching.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4661101037 | TRANSMISSION HOUSING | Main casing for gear and shaft support |
| 4661301099 | HOUSING II | Secondary housing for clutch pack retention |
| 0631306174 | CYLINDRICAL PIN | Alignment dowel for housing mating |
| 0769123894 | TYPE PLATE | Identification tag with transmission specs |
| 0750100022 | SCREW PLUG | Seals oil passages in the valve body |
| 4660201008 | SCREW PLUG | Magnetic drain plug for debris collection |
| 0636100117 | SCREW PLUG | Pressure test port plug |
| 0501211384 | VALVE | Modulating valve for shift pressure control |
| 0732042156 | COMPRESSION SPRING | Returns valve spool to neutral position |
| 0768409154 | SCREW PLUG | Seals the clutch piston feed bore |
