Overview
The ZF 4661.044.005 3 WG 94 Powershift Transmission Assembly | Complete Unit is a fully assembled, drop-in ready core for heavy-duty powershift applications. As a complete unit, it integrates the main gear cluster, clutch packs, and hydraulic control components into a single, factory-matched assembly. This SKU, 4661.044.005, sits as the central power transfer module within the WG 94 series, directly coupling the torque converter to the output driveline. For a full rebuild, ensure the TRANSMISSION HOUSING and HOUSING II are inspected for wear, as these structures support the complete unit’s alignment.
Symptoms of Failure
- Erratic gear engagement and slipping under load: When the complete unit wears, internal clutch clearance increases, causing delayed or harsh shifts, especially during forward-to-reverse transitions.
- Low hydraulic pressure and overheating: A failing assembly often loses internal sealing, leading to pressure drops below 12 bar, which triggers thermal runaway in the oil circuit.
- Metallic debris in the oil pan: Worn planetary gears or thrust washers shed ferrous particles, which can be confirmed by magnetic plug inspection.
- Oil leaks at the main case joint: Cracks in the assembly housing or degraded gaskets allow ATF to weep, often traced back to a damaged CYLINDRICAL PIN that secures alignment.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number / SKU | 4661.044.005 |
| Assembly Type | 3 WG 94 Powershift (Complete Unit) |
| Dry Weight (approx.) | 185 kg (408 lbs) |
| Overall Length | 620 mm |
| Overall Width | 480 mm |
| Overall Height | 410 mm |
| Housing Material | High-strength aluminum alloy (A356-T6) |
| OEM Reference | ZF 4661 044 005 |
| Max Input Torque | 1,200 Nm |
| Hydraulic Pressure Range | 14–18 bar |
Compatibility
This complete unit is engineered for the WG 94 Series powershift transmissions. It is directly compatible with the following ZF models: WG180, WG200, and WG211 (3-speed variants). It also fits select WG150 and WG250 configurations when used with the correct adapter plate. The assembly is designed for use in wheel loaders, forklifts, and industrial tractors requiring a compact, high-torque powershift package. Always verify the TYPE PLATE on your existing unit to confirm model matching before installation.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4661101039 | TRANSMISSION HOUSING | Main structural casing for gear and clutch support |
| 4661301109 | HOUSING II | Rear section housing output shaft and bearings |
| 0631306174 | CYLINDRICAL PIN | Alignment dowel for housing-to-assembly fit |
| 0769123894 | TYPE PLATE | Identification tag for transmission model and serial |
| 0750100022 | SCREW PLUG | Oil drain port seal (M22x1.5) |
| 4660201008 | SCREW PLUG | Pressure test port plug |
| 0636100117 | SCREW PLUG | Filter housing plug (M18x1.5) |
| 0501211384 | VALVE | Modulating pressure control valve |
| 0732042156 | COMPRESSION SPRING | Return spring for clutch piston |
| 0768409154 | SCREW PLUG | Cooler line port plug |
