Overview
The ZF 4646.006.060 6 WG 258 ERGOPOWER Transmission Assembly | Complete Unit is a fully assembled, ready-to-install core component designed for heavy-duty commercial vehicle drivetrains. This complete assembly integrates the gear set, clutch pack, and hydraulic control system into a single, pre-tested unit. As the central power transfer module, it sits between the engine and the differential, managing torque distribution across six forward gears and one reverse gear. The SKU 4646.006.060 identifies this as a direct OEM replacement for the WG 258 series, ensuring seamless integration with existing ZF ERGOPOWER architectures. When installing this assembly, always pair it with a new TRANSMISSION HOUSING to maintain structural integrity and proper oil sealing.
Symptoms of Failure
When the ZF 4646.006.060 assembly begins to degrade, operators typically notice these specific failure indicators:
- Erratic gear engagement or slipping under load – Worn internal clutches or valve body wear cause the transmission to hesitate or lose torque during acceleration, especially on inclines.
- Persistent oil leaks near the bell housing – Degraded seals or a cracked HOUSING allow transmission fluid to escape, leading to low pressure and eventual gear failure.
- Unusual whining or grinding noises during shifting – Bearing fatigue or gear tooth pitting produces audible metal-on-metal sounds, particularly in lower gears.
- Delayed or harsh shifting between 2nd and 3rd gear – Hydraulic circuit blockages or solenoid malfunctions cause abrupt engagement, reducing driver comfort and component lifespan.
Technical Specifications
| Part Number | 4646.006.060 |
| Assembly Type | Complete ERGOPOWER Unit (6 WG 258) |
| Weight | Approx. 285 kg (628 lbs) |
| Dimensions (L x W x H) | 820 mm x 510 mm x 480 mm |
| Housing Material | Aluminum alloy with cast iron reinforcement |
| OEM Reference | ZF 4646.006.060 |
| Fluid Capacity | 18.5 liters (ZF EcoFluid M-1375.4) |
| Max Input Torque | 2,500 Nm |
Compatibility
This 6 WG 258 ERGOPOWER assembly is engineered for ZF’s WG series of powershift transmissions. It is directly compatible with the following models: WG180, WG200, WG250, and WG258. It also fits select variants of the WG310 series when used with the appropriate adapter plate. For proper installation, ensure the 螺栓 (mounting bolts) are torqued to OEM specifications, and affix the TYPE PLATE for future identification. This unit is commonly deployed in municipal buses, refuse trucks, and medium-duty construction vehicles.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4646101162 | TRANSMISSION HOUSING | Encloses and protects internal gear sets |
| 4646301334 | HOUSING | Secondary housing for valve body |
| 0636115293 | 螺栓 | High-strength mounting bolt |
| 0730365125 | TYPE PLATE | Identification and specification label |
| 4646201003 | POT | Oil pressure sensor port |
| 4646106024 | SHIFT SYSTEM | Electro-hydraulic shift actuator |
| 4646306071 | GASKET | Seals housing joint surfaces |
| 4646306072 | ADAPTER PLATE | Connects transmission to engine bell housing |
| 4646306073 | GASKET | Seals adapter plate interface |
| 0636102065 | CAP SCREW | Secures valve body cover |
