Overview
The ZF 4661.044.008 3 WG 94 Powershift Transmission Assembly is a complete, factory-matched unit engineered for heavy-duty off-highway machinery. This fully assembled gearbox integrates the clutch pack, planetary gear sets, and hydraulic control elements into a single drop-in solution. As the core of the WG 94 series, it manages torque distribution across multiple speeds under extreme loads. The SKU 4661.044.008 identifies this specific assembly, which is designed to replace worn or failed transmissions in wheel loaders, dozers, and material handlers. It interfaces directly with the TRANSMISSION HOUSING and the HOUSING II to form a sealed, pressurized oil circuit.
Symptoms of Failure
- Delayed or harsh engagement: When the assembly loses internal seal integrity, hydraulic pressure drops, causing a noticeable lag when shifting from neutral to forward or reverse. Operators often report a “clunk” or jerk during gear changes.
- Torque converter shudder under load: Worn clutch discs or degraded valve body function within the 4661.044.008 produce a vibration or shudder when the machine is under heavy load, particularly during acceleration from a stop.
- External oil seepage at mating flanges: Cracks or gasket failures in the assembly lead to ATF leaks around the joint where the unit meets the CYLINDRICAL PIN alignment bores. This is often visible as drips on the bell housing.
- Erratic shift patterns or gear slippage: Internal wear causes the transmission to slip out of gear under load or skip gears entirely, often accompanied by a rising engine RPM without corresponding vehicle speed.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number / SKU | 4661.044.008 |
| Assembly Type | Complete Powershift Transmission (3 WG 94) |
| Dry Weight (approx.) | 185 kg (408 lbs) |
| Overall Length | 620 mm |
| Overall Width | 480 mm |
| Overall Height | 510 mm |
| Housing Material | High-strength cast iron (GGG-40) |
| OEM Reference | ZF 4661.044.008 / 3 WG 94 |
| Max Input Torque | 1,200 Nm (885 lb-ft) |
| Oil Capacity | 12.5 liters (3.3 gal) |
Compatibility
This complete unit is specifically engineered for the ZF WG 94 series of powershift transmissions. It is a direct fit for models including the WG180, WG200, and WG211 variants commonly found in articulated dump trucks and large wheel loaders. The assembly also integrates with earlier WG 92-series housings when used with the correct TYPE PLATE adapter kit. Always verify the serial number on your existing transmission housing before ordering.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4661101039 | TRANSMISSION HOUSING | Main structural casing for gear and shaft support |
| 4661301109 | HOUSING II | Rear section housing the output shaft and PTO drive |
| 0631306174 | CYLINDRICAL PIN | Alignment dowel for precise housing mating |
| 0769123894 | TYPE PLATE | Identification plate with model and serial number |
| 0750100022 | SCREW PLUG | Oil drain port sealing plug |
| 4660201008 | SCREW PLUG | Pressure test port plug |
| 0636100117 | SCREW PLUG | Filter housing plug |
| 0501211384 | VALVE | Modulating pressure control valve |
| 0732042156 | COMPRESSION SPRING | Valve return spring for shift timing |
| 0768409154 | SCREW PLUG | High-pressure gallery plug |
