Overview
The ZF 4661.004.032 5 WG 94 Powershift Transmission Assembly represents a complete, drop-in replacement unit engineered for heavy-duty off-highway applications. As the core rotating assembly within the WG 94 series, this SKU 4661.004.032 integrates the planetary gear sets, clutch packs, and hydraulic control elements required for seamless power delivery. This complete unit replaces the need for individual component rebuilds, ensuring that the torque converter and output shaft maintain precise alignment. When installed, it mates directly with the TRANSMISSION HOUSING and the HOUSING II to form a sealed, pressurized assembly.
Symptoms of Failure
- Delayed engagement or gear slippage under load: Worn clutch discs within the 4661.004.032 cause the transmission to hesitate before moving, or to slip when climbing grades. This is often accompanied by burnt transmission fluid odor.
- Erratic shifting and harsh direction changes: As internal seals degrade, hydraulic pressure fluctuates, leading to jarring forward-to-reverse shifts that can damage driveline components.
- Metallic grinding noise from the bell housing: Failed bearings or planetary gear damage inside the assembly produce a distinct whining or grinding sound that increases with engine RPM.
- External oil leaks at the output flange: Cracks in the assembly housing or failed gaskets allow ATF to weep from the rear seal area, often pooling on the crossmember.
Technical Specifications
| Parameter | Specification |
|---|---|
| Part Number / SKU | 4661.004.032 |
| Assembly Type | Complete Powershift Unit (5-speed) |
| Dry Weight (approx.) | 185 kg (408 lbs) |
| Overall Length | 720 mm |
| Overall Width | 480 mm |
| Overall Height | 510 mm |
| Primary Material | Cast Iron Housing / Hardened Steel Gears |
| OEM Reference | ZF WG 94 Series |
| Fluid Capacity | 12.5 liters (approx.) |
Compatibility
This 4661.004.032 assembly is specifically designed for the ZF WG 94 series of powershift transmissions. It is a direct fit for models including the WG180, WG200, and WG210. These transmissions are commonly found in telescopic handlers, wheel loaders, and rough-terrain forklifts from manufacturers such as Manitou, JCB, and Merlo. The unit also shares mounting interfaces with the TUBE for lubrication routing and the CYLINDRICAL PIN for precise alignment during installation.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4661101016 | TRANSMISSION HOUSING | Main structural casing for gear support |
| 4661301049 | HOUSING II | Secondary housing for clutch pack enclosure |
| 4661301093 | TUBE | Lubrication oil delivery conduit |
| 0631306174 | CYLINDRICAL PIN | Alignment dowel for housing mating |
| 0769123894 | TYPE PLATE | Identification tag for serial number |
| 0750100022 | SCREW PLUG | Seals oil passages during transport |
| 0636302602 | SCREW PLUG | Magnetic drain plug for debris capture |
| 0634100633 | O-RING | Hydraulic seal for pressure circuits |
| 4661301029 | NOZZLE | Spray nozzle for clutch cooling |
| 4661301027 | NOZZLE | Secondary spray nozzle for planetary lube |
