Overview
The ZF 4661.044.001 3 WG 94 Powershift Transmission Assembly | Complete Unit is a fully integrated, factory-assembled gearbox core designed for heavy-duty off-highway machinery. This complete unit serves as the primary power distribution hub within the WG 94 series, managing torque flow from the engine to the driveline through multiple planetary gear sets. The SKU 4661.044.001 identifies a remanufactured or new complete assembly, which includes the main housing, clutch packs, and hydraulic control components. It sits directly between the torque converter and the output flange, providing seamless shifting under load. For structural integrity, this unit is paired with the 4661101038: TRANSMISSION HOUSING and the 4661301098: HOUSING II, which enclose the rotating elements and maintain alignment.
Symptoms of Failure
- Delayed or harsh engagement – When the complete unit wears, you may notice a pronounced lag between gear selection and actual movement, often accompanied by a jarring shift. This is a common symptom of internal clutch pack degradation.
- Oil leaks at the main case seam – A failing assembly can cause hydraulic fluid to weep from the joint between the main housing and Housing II, leading to low oil levels and eventual overheating.
- Gear slipping under load – If the transmission loses torque during uphill climbs or heavy hauling, the internal seals or pistons within the 4661.044.001 may be compromised, allowing pressure loss.
- Unusual whining or grinding noises – Worn bearings or planetary gears inside the complete unit produce a metallic sound that intensifies with speed, indicating imminent failure.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number | 4661.044.001 |
| Series | WG 94 (3 WG 94 variant) |
| Assembly Type | Complete Powershift Unit |
| Dry Weight (approx.) | 185 kg (408 lbs) |
| Overall Length | 620 mm |
| Overall Width | 480 mm |
| Overall Height | 510 mm |
| Housing Material | Cast Iron (GGG-40) |
| OEM Reference | ZF 4661.044.001 |
| Fastener Torque (main bolts) | 120 Nm |
Compatibility
This complete unit is engineered for the ZF WG 94 series powershift transmissions. It is directly compatible with models including the WG180, WG200, and WG210 variants used in wheel loaders, graders, and industrial tractors. The assembly also fits select WG 94 configurations found in older ZF drivelines. For proper installation, ensure the 0631306174: CYLINDRICAL PIN is used to align the housing halves, and affix the 0769123894: TYPE PLATE for identification after rebuild.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4661101038 | TRANSMISSION HOUSING | Main structural casing for gear sets |
| 4661301098 | HOUSING II | Secondary housing covering clutch packs |
| 0631306174 | CYLINDRICAL PIN | Alignment dowel for housing assembly |
| 0769123894 | TYPE PLATE | Identification tag for transmission model |
| 0750100022 | SCREW PLUG | Seals oil passages in housing |
| 4660201008 | SCREW PLUG | Drain or fill port closure |
| 0636100117 | SCREW PLUG | High-pressure port seal |
| 0501211384 | VALVE | Hydraulic control valve for shift modulation |
| 0732042156 | COMPRESSION SPRING | Returns valve spool to neutral position |
| 0768409154 | SCREW PLUG | Low-pressure circuit seal |
