Overview
The ZF 4661.004.046 4 WG 94 Powershift Transmission Assembly | Complete Unit is a fully integrated drop-in solution designed for heavy-duty off-highway machinery. As a complete assembly, this unit serves as the core power transfer module within the WG 94 series, managing torque distribution across multiple gear ranges. The SKU 4661.004.046 identifies a factory-matched assembly that includes the main gear cluster, clutch packs, and hydraulic control elements. This unit sits between the engine bell housing and the final drive, converting engine power into controlled, shiftable output for loaders, graders, and industrial tractors.
Symptoms of Failure
- Delayed or harsh engagement – When the assembly wears, operators notice a pronounced lag between shifting and actual gear engagement, often accompanied by a jarring clunk. This indicates internal clutch pack wear or hydraulic pressure loss.
- Erratic gear slipping under load – A common failure symptom is the transmission slipping out of gear when the machine is under heavy load, such as during grading or pushing. This points to worn friction discs or damaged seals within the unit.
- External oil leaks near the bell housing – Visible fluid seepage around the main housing interface often results from degraded gaskets or cracks in the TRANSMISSION HOUSING. Left unchecked, this leads to low oil pressure and eventual gearbox failure.
- Whining or grinding noises during shifts – Metallic sounds from the transmission cavity suggest bearing failure or contamination from debris, often originating from a compromised HOUSING II or a blocked TUBE.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number | 4661.004.046 |
| Series | WG 94 |
| Assembly Type | Complete Powershift Unit |
| Dry Weight (approx.) | 185 kg (408 lbs) |
| Overall Length | 720 mm |
| Overall Width | 480 mm |
| Overall Height | 510 mm |
| Primary Material | Cast Iron / Alloy Steel |
| OEM Reference | ZF 4 WG 94 |
| Mounting Hardware | Includes CYLINDRICAL PIN alignment dowels |
Compatibility
This complete assembly is engineered for the ZF WG 94 transmission family. It is directly compatible with models such as the WG180, WG200, and WG210 series, which are commonly deployed in articulated dump trucks, wheel loaders, and telescopic handlers. The 4661.004.046 unit also fits select variants of the WG 98 and WG 100 series where the bell housing pattern matches. Always verify the housing interface against your existing TRANSMISSION HOUSING before installation.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4661101028 | TRANSMISSION HOUSING | Main structural casing that encloses the gear train |
| 4661301049 | HOUSING II | Secondary housing supporting the output shaft and bearings |
| 4661301093 | TUBE | Hydraulic fluid conduit for clutch actuation |
| 0631306174 | CYLINDRICAL PIN | Alignment dowel for precise housing assembly |
| 0769123894 | TYPE PLATE | Identification plate with serial number and specs |
| 0750100022 | SCREW PLUG | Sealing plug for oil drain or fill ports |
| 0636302602 | SCREW PLUG | Secondary sealing plug for pressure test points |
| 0634100633 | O-RING | Elastomeric seal preventing fluid leaks at joints |
| 4661301029 | NOZZLE | Lubrication jet for gear mesh cooling |
| 4661301027 | NOZZLE | Secondary lubrication nozzle for clutch pack |
