Overview
The ZF 4661.042.015 2 WG 94 Powershift Transmission Assembly | Complete Unit (SKU: 4661.042.015) is a fully assembled, factory-spec powershift transmission designed for heavy-duty off-highway applications. This complete unit integrates the main gear cluster, clutch packs, and hydraulic control system into a single, ready-to-install package. As a core component of the WG 94 Series, it replaces the entire transmission assembly, eliminating the need for piecemeal rebuilding. The unit interfaces directly with the TRANSMISSION HOUSING and the HOUSING II to form a sealed, pressurized oil circuit. Every assembly includes the CYLINDRICAL PIN for precise alignment of internal shafts and a TYPE PLATE for OEM identification.
Symptoms of Failure
- Erratic shifting or gear slipping under load: Worn clutch discs or degraded seals within the assembly cause the transmission to lose hydraulic pressure, resulting in delayed engagement or complete loss of drive in specific ranges.
- External oil leaks at housing seams: Cracks in the main casing or degraded gaskets between the TRANSMISSION HOUSING and the HOUSING II allow ATF to escape, leading to low fluid levels and eventual overheating.
- Unusual whining or grinding noises from the gear train: Bearing fatigue or damaged planetary gears produce metallic sounds, particularly during directional changes or when the transmission is cold.
- Delayed engagement when shifting from neutral to forward/reverse: Internal valve body wear or a stuck CYLINDRICAL PIN can prevent proper oil flow, causing a 2-5 second lag before the transmission responds.
Technical Specifications
| Parameter | Specification |
|---|---|
| Part Number | 4661.042.015 |
| Assembly Type | Complete Powershift Transmission (2 WG 94) |
| Overall Length | ~680 mm (26.8 in) |
| Overall Width | ~420 mm (16.5 in) |
| Overall Height | ~510 mm (20.1 in) |
| Dry Weight | ~185 kg (408 lbs) |
| Housing Material | High-strength cast iron (GGG-40) |
| OEM Reference | ZF 4661.042.015 |
| Max Input Torque | 1,200 Nm (885 lb-ft) |
| Oil Capacity | ~14 L (3.7 gal) |
Compatibility
This complete unit is engineered for the ZF WG 94 Series powershift transmissions. It is directly compatible with the following ZF models: WG94, WG98, WG100, and WG120. It also fits select variants of the WG180 and WG200 series when used with the appropriate adapter kit. The assembly is commonly found in telehandlers, wheel loaders, and rough-terrain forklifts from manufacturers such as JCB, Manitou, and Caterpillar. Always verify the housing casting number against the TYPE PLATE to ensure correct fitment.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4661101037 | TRANSMISSION HOUSING | Main structural casing for gear and clutch assembly |
| 4661301099 | HOUSING II | Secondary housing for rear output shaft and PTO |
| 0631306174 | CYLINDRICAL PIN | Alignment dowel for precise housing mating |
| 0769123894 | TYPE PLATE | OEM identification and serial number tag |
| 0750100022 | SCREW PLUG | Seals oil passages in the valve body |
| 4660201008 | SCREW PLUG | Closes pressure test ports on the housing |
| 0636100117 | SCREW PLUG | Drain plug for the torque converter cavity |
| 0501211384 | VALVE | Hydraulic control valve for clutch modulation |
| 0732042156 | COMPRESSION SPRING | Returns valve spool to neutral position |
| 0768409154 | SCREW PLUG | Seals the main pressure relief valve bore |
