Overview
The ZF 4661.042.009 2 WG 94 Powershift Transmission Assembly is a complete, factory-matched unit designed for heavy-duty off-highway machinery. This assembly integrates the main gear cluster, clutch packs, and hydraulic control circuits into a single, ready-to-install package. As the core power transfer module in the WG 94 series, it replaces worn or failed internal components without the need for piecemeal rebuilding. The SKU 4661.042.009 is the definitive identifier for this complete assembly, ensuring correct fitment when paired with the TRANSMISSION HOUSING and the HOUSING II.
Symptoms of Failure
- Delayed or harsh engagement: When the assembly’s clutch packs wear, you may notice a pronounced lag or a jarring shift when moving from neutral to forward or reverse. This often accompanies a loss of hydraulic pressure.
- Oil leaks at the main case seam: Degraded seals within the assembly can cause transmission fluid to weep from the joint between the main housing and the HOUSING II, leaving visible puddles under the machine.
- Gear slipping under load: A failing power shift unit may allow the transmission to momentarily lose torque during heavy pulling or climbing, indicated by a sudden engine RPM spike without corresponding vehicle speed increase.
- Unusual grinding or whining noise: Worn bearings or damaged planetary gears inside the assembly produce a metallic grinding sound, particularly during deceleration or when turning under load.
Technical Specifications
| Parameter | Specification |
|---|---|
| Part Number / SKU | 4661.042.009 |
| Assembly Type | Complete Powershift Unit (2 WG 94) |
| Overall Length (approx.) | 480 mm |
| Overall Width (approx.) | 320 mm |
| Overall Height (approx.) | 310 mm |
| Dry Weight (approx.) | 52 kg (115 lbs) |
| Primary Material | Cast Iron Housing with Hardened Steel Gears |
| OEM Reference | ZF 4661.042.009 |
| Hydraulic Control | Integrated Valve Body with Modulating Pistons |
Compatibility
This complete assembly is engineered for the ZF WG 94 series of powershift transmissions. It is directly compatible with models including the WG180, WG200, and WG211 found in telehandlers, wheel loaders, and agricultural tractors. The unit also fits select variants of the WG 94 used in early 2000s construction equipment. For precise fitment, always verify the transmission serial number against the SKU 4661.042.009 and confirm the TYPE PLATE identification. Additionally, the assembly requires the CYLINDRICAL PIN for correct alignment during installation.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4661101024 | TRANSMISSION HOUSING | Main structural casing for the gear train |
| 4661301054 | HOUSING II | Secondary housing covering the clutch pack area |
| 0631306174 | CYLINDRICAL PIN | Alignment dowel for housing assembly |
| 0769123894 | TYPE PLATE | Identification plate with transmission specs |
| 0750100022 | SCREW PLUG | Seals hydraulic test ports |
| 4660201008 | SCREW PLUG | Oil drain plug for the sump |
| 0636100117 | SCREW PLUG | Pressure relief port plug |
| 0501211384 | VALVE | Modulating valve for shift quality |
| 0732042156 | COMPRESSION SPRING | Returns valve spool to neutral position |
| 0768409154 | SCREW PLUG | Seals the valve body access port |
