Overview
The ZF 4661.042.014 2 WG 94 Powershift Transmission Assembly | Complete Unit is a fully assembled, drop-in ready drivetrain component engineered for heavy-duty off-highway machinery. This complete unit integrates the clutch packs, planetary gear sets, and hydraulic control system within a single robust housing. As the core of the WG 94 series, it manages torque distribution and speed ratio changes under load without interrupting power flow. The SKU 4661.042.014 identifies this as a factory-matched assembly, ensuring precise alignment of internal components. It mounts directly between the engine bellhousing and the final drive, with the TRANSMISSION HOUSING providing structural integrity and the HOUSING II enclosing the rear clutch section. A CYLINDRICAL PIN secures the shift fork alignment, while the TYPE PLATE carries the serial number for traceability.
Symptoms of Failure
- Delayed or harsh engagement – When the complete unit wears, hydraulic pressure drops, causing a noticeable lag when shifting from neutral to forward or reverse. Operators report a “clunk” as clutches grab unevenly.
- Oil leaks at the housing seam – Cracks in the TRANSMISSION HOUSING or degraded gaskets allow ATF to weep, leaving puddles under the machine. This is a common failure symptom in high-hour units.
- Gear slipping under load – Worn clutch packs inside the assembly cause the transmission to lose torque during uphill travel or when pushing heavy loads, often accompanied by a burning smell from overheated friction material.
- Erratic shift patterns – A failing valve body or damaged CYLINDRICAL PIN can cause the transmission to skip gears or hang in neutral, leading to uncommanded speed changes.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number / SKU | 4661.042.014 |
| Assembly Type | Complete Powershift Unit (2 WG 94) |
| Overall Length | ~720 mm |
| Overall Width | ~480 mm |
| Overall Height | ~520 mm |
| Dry Weight | ~185 kg (408 lbs) |
| Housing Material | High-grade cast iron (GGG-40) |
| OEM Reference | ZF 4661.042.014 / WG 94 Series |
| Max Input Torque | 2,400 Nm |
| Hydraulic Pressure Range | 14–18 bar |
Compatibility
This complete unit is designed exclusively for the ZF WG 94 series of powershift transmissions. It is a direct fit for models including WG94, WG180, and WG200 used in wheel loaders, graders, and industrial tractors. The assembly is not backward-compatible with older WG 80 or WG 120 series without significant modifications to the TRANSMISSION HOUSING and hydraulic circuit. Always verify the serial number on the TYPE PLATE before ordering.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4661101040 | TRANSMISSION HOUSING | Main structural casing for gear and clutch assembly |
| 4661301107 | HOUSING II | Rear housing covering output shaft and clutch pack |
| 0631306174 | CYLINDRICAL PIN | Alignment pin for shift fork and valve body positioning |
| 0769123894 | TYPE PLATE | Identification plate with serial number and model data |
| 0750100022 | SCREW PLUG | Seals hydraulic test ports and drain holes |
| 4660201008 | SCREW PLUG | Magnetic plug for debris collection in sump |
| 0636100117 | SCREW PLUG | Low-profile plug for pressure line access |
| 0501211384 | VALVE | Modulating valve for clutch pressure control |
| 0732042156 | COMPRESSION SPRING | Returns valve spool to neutral position |
| 0768409154 | SCREW PLUG | Seals accumulator charging port |
