Overview
The ZF 4661.043.037 3 WG 94 Powershift Transmission Assembly is a complete, factory-matched unit designed for heavy-duty off-highway applications. This assembly integrates the main drive housing, clutch packs, and hydraulic control circuits into a single, ready-to-install package. As the core of the WG 94 series, it manages torque distribution across multiple speeds, ensuring smooth power delivery under extreme loads. The SKU 4661.043.037 identifies this as a full assembly, not a sub-component, making it a direct replacement for worn-out transmissions in loaders, graders, and industrial tractors. This unit works in concert with the 4661101046: HOUSING and the 4661301125: HOUSING II to form the sealed structural backbone of the gear train.
Symptoms of Failure
- Erratic shifting or gear slippage under load: When the internal clutch discs or seals degrade, the transmission fails to hold pressure, causing the machine to lose power during uphill travel or heavy digging.
- External oil leaks at the main case seam: A compromised 4661101046: HOUSING or its mating surface allows hydraulic fluid to weep, leaving puddles under the vehicle and reducing system pressure.
- Delayed engagement from neutral to forward/reverse: Worn valve bodies or a damaged 0631306174: CYLINDRICAL PIN can cause hesitation, making precise maneuvering difficult.
- Unusual grinding or whining noise from the bell housing: Bearing failure inside the assembly often produces a metallic sound that worsens with RPM changes, indicating imminent internal damage.
Technical Specifications
| Parameter | Value |
|---|---|
| Assembly Weight (approx.) | 185 kg (408 lbs) |
| Overall Length | 620 mm |
| Overall Width | 480 mm |
| Overall Height | 510 mm |
| Primary Material | High-grade cast iron (housing) with steel alloy internals |
| OEM Reference | ZF 4661.043.037 (3 WG 94) |
| Fluid Capacity (approx.) | 12.5 liters |
| Max Input Torque (est.) | 950 Nm |
Compatibility
This complete unit is engineered for the WG 94 Series of ZF powershift transmissions. It is directly compatible with models including the WG180, WG200, and WG211, which are commonly found in construction and agricultural machinery. The assembly also fits select variants of the WG150 and WG160 when paired with the correct 0769123894: TYPE PLATE for identification. Always verify your existing transmission tag before ordering.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4661101046 | HOUSING | Main structural case for gear and shaft support |
| 4661301125 | HOUSING II | Secondary housing for clutch pack and valve mounting |
| 0631306174 | CYLINDRICAL PIN | Alignment dowel for precise housing positioning |
| 0769123894 | TYPE PLATE | Identification tag with serial and model data |
| 0750100022 | SCREW PLUG | Seals oil passages and drain ports |
| 4660201008 | SCREW PLUG | High-pressure port sealing plug |
| 0636100117 | SCREW PLUG | Magnetic drain plug for debris collection |
| 0501211384 | VALVE | Hydraulic control valve for shift modulation |
| 0732042156 | COMPRESSION SPRING | Returns valve spools to neutral position |
| 0768409154 | SCREW PLUG | Low-pressure circuit sealing plug |
