Overview
The ZF 4661.004.049 4 WG 94 Powershift Transmission Assembly represents a complete, factory-grade replacement unit designed for heavy-duty off-highway machinery. This SKU 4661.004.049 integrates the full clutch pack, planetary gear sets, and hydraulic control valving into a single drop-in assembly. As the core rotating assembly of the WG 94 Series, it directly interfaces with the TRANSMISSION HOUSING to transfer torque from the engine to the driveline. Precision-manufactured to OEM tolerances, this complete unit eliminates the need for partial rebuilds, ensuring immediate operational reliability in loaders, graders, and industrial tractors.
Symptoms of Failure
- Delayed or harsh engagement: When the internal clutch discs wear, operators experience a noticeable lag between shifting and power delivery, often accompanied by a jarring “clunk” under load.
- Low hydraulic pressure and overheating: Worn seals within the assembly cause internal leakage, leading to a drop in line pressure and rapid transmission fluid overheating during sustained operation.
- Metallic debris in the oil pan: Advanced wear of the planetary gears or thrust washers produces fine metallic particles visible during routine oil changes, indicating imminent catastrophic failure.
- Intermittent gear slipping under load: The transmission may momentarily lose drive torque on inclines or when pushing heavy material, a classic sign of failing clutch packs within the 4661.004.049 unit.
Technical Specifications
| Parameter | Specification |
|---|---|
| OEM Part Number | 4661.004.049 |
| Assembly Type | Complete Powershift Unit (4 WG 94) |
| Dry Weight (approx.) | 185 kg (408 lbs) |
| Overall Length | 620 mm |
| Overall Width | 480 mm |
| Overall Height | 410 mm |
| Primary Material | High-strength alloy steel / cast iron |
| OEM Reference | ZF 4 WG 94 |
| Torque Capacity (est.) | 1,200 Nm |
Compatibility
This complete assembly is engineered for the ZF WG 94 Series powershift transmissions. It is a direct fit for models including the WG94, WG180, and WG200 when used in construction equipment such as Volvo L90 loaders, Case 821 machines, and certain JCB telehandlers. The unit replaces the internal rotating group and requires proper alignment with the HOUSING II during installation. Always verify the serial number of your existing transmission to confirm compatibility with the 4661.004.049 specification.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4661101028 | TRANSMISSION HOUSING | Main structural casing for the gear train |
| 4661301049 | HOUSING II | Rear housing supporting output shaft bearings |
| 4661301093 | TUBE | Hydraulic feed tube for clutch lubrication |
| 0631306174 | CYLINDRICAL PIN | Alignment dowel for housing mating surfaces |
| 0769123894 | TYPE PLATE | Identification plate with transmission serial number |
| 0750100022 | SCREW PLUG | Magnetic drain plug for oil pan |
| 0636302602 | SCREW PLUG | Hexagonal fill plug for transmission housing |
| 0634100633 | O-RING | Seal for hydraulic line connections |
| 4661301029 | NOZZLE | Lubrication jet for planetary gear set |
| 4661301027 | NOZZLE | Secondary lubrication nozzle for clutch pack |
