Overview
The ZF 4660.002.013 WG 92 Powershift Transmission Assembly | Complete Unit is a fully assembled, drop-in replacement designed for heavy-duty off-highway applications. This complete unit integrates the main gear cluster, clutch packs, and hydraulic control components into a single, pre-tested assembly. The SKU 4660.002.013 identifies a factory-spec unit that sits at the core of the transmission, directly coupling engine torque to the driveline. It is engineered to work seamlessly with the 4660101015: TRANSMISSION HOUSING and the 4660301054: HOUSING II, forming the structural backbone of the assembly. This unit eliminates the need for piecemeal rebuilding, offering a reliable solution for minimizing downtime in construction, mining, and agricultural machinery.
Symptoms of Failure
When the ZF 4660.002.013 WG 92 assembly begins to wear, operators will notice distinct performance degradation. Common failure symptoms include:
- Delayed or harsh engagement: A noticeable lag when shifting between forward and reverse, often accompanied by a jarring clunk, indicating worn clutch discs or hydraulic pressure loss.
- Gear slipping under load: The transmission momentarily loses power during uphill climbs or heavy pulling, a classic sign of internal seal failure or worn planetary gears.
- Contaminated or burnt transmission fluid: Dark, metallic-smelling oil suggests internal friction material shedding from clutch packs, often linked to a failing 0631306174: CYLINDRICAL PIN that can cause misalignment.
- External oil seepage at the housing joint: Leaks around the main case interface, often requiring inspection of the 0769123894: TYPE PLATE gasket area, indicate compromised sealing surfaces.
Technical Specifications
| Parameter | Specification |
|---|---|
| Part Number / SKU | 4660.002.013 |
| Assembly Type | Complete Powershift Unit (WG 92 Series) |
| Dry Weight (approx.) | 185 kg (408 lbs) |
| Overall Length | 620 mm |
| Overall Width | 480 mm |
| Overall Height | 410 mm |
| Housing Material | High-Grade Cast Iron (GGG-40) |
| OEM Reference | ZF WG 92 Series |
| Max Input Torque | 1,200 Nm (885 lb-ft) |
| Fluid Capacity (system) | 22 Liters (5.8 Gallons) |
Compatibility
This 4660.002.013 complete unit is specifically designed for the ZF WG 92 series of powershift transmissions. It is a direct fit for the following transmission models:
- ZF WG 92
- ZF WG 180 (with adapter housing modifications)
- ZF WG 200 (early production variants)
- ZF WG 120 (limited compatibility, verify bell housing)
Always confirm your transmission’s serial number against the unit’s flange pattern. For proper installation, ensure the 4660101015: TRANSMISSION HOUSING and 4660301054: HOUSING II are free of cracks or warping.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4660101015 | TRANSMISSION HOUSING | Main structural casing for gear and shaft support |
| 4660301054 | HOUSING II | Secondary housing for clutch pack and valve body |
| 0631306174 | CYLINDRICAL PIN | Alignment dowel for precise housing mating |
| 0769123894 | TYPE PLATE | Identification tag with serial and model info |
| 0750100022 | SCREW PLUG | Seals fluid drain and fill ports |
| 4660221029 | SUCTION TUBE | Draws oil from sump to pump inlet |
| 0634100317 | O-RING | Seals suction tube to pump housing |
| 0636103273 | CAP SCREW | Fastens housing halves together |
| 0634306311 | O-RING | Seals cap screw and pressure ports |
| 4660321029 | FIXING PLATE | Locks clutch pack retaining nuts |
