Overview
The ZF 4657.066.039 6 WG 211 Powershift Transmission Assembly | Complete Unit is a fully assembled, drop-in ready gearbox core designed for heavy-duty off-highway machinery. This complete unit integrates the main gear cluster, clutch packs, and hydraulic valve body within a single housing, serving as the central power transfer module for ZF’s WG 211 series. The SKU 4657.066.039 denotes a factory-matched assembly that eliminates the need for individual component shimming. It mounts directly between the engine bellhousing and the final drive, with the TRANSMISSION HOUSING providing structural integrity for the entire drivetrain.
Symptoms of Failure
- Delayed or harsh engagement when shifting under load: Worn clutch discs or piston seals inside the assembly cause sluggish gear changes, often accompanied by a loud “clunk.” This is a common search query for “ZF WG211 shifting problems.”
- Torque converter shudder at low RPM: Internal wear in the lock-up clutch or stator assembly leads to vibration during inching operations, frequently searched as “powershift transmission shudder fix.”
- External oil seepage from the main case seam: Fatigue in the gasket between the HOUS.FRONT SECT and the HOUSING REAR PART results in fluid loss, a typical symptom of “ZF transmission rear housing oil leak.”
- Metal debris in the hydraulic filter: Advanced gear or bearing degradation generates metallic particles, indicating imminent catastrophic failure of the complete unit.
Technical Specifications
| Parameter | Specification |
|---|---|
| Part Number | 4657.066.039 |
| Assembly Type | 6-Speed Powershift (Complete Unit) |
| Dry Weight | Approx. 285 kg (628 lbs) |
| Overall Length | 720 mm |
| Overall Width | 480 mm |
| Overall Height | 510 mm |
| Primary Material | Cast Iron Housing with Steel Gears |
| OEM Reference | ZF 6 WG 211 |
| Torque Capacity | 1,100 Nm (estimated) |
Compatibility
This complete unit is engineered for the ZF WG 211 Series powershift transmissions. It is directly compatible with models including the WG180, WG200, and WG211 variants used in telescopic handlers, wheel loaders, and agricultural tractors. The assembly interfaces with the CYLINDRICAL PIN for precise alignment during installation. Always verify the bellhousing pattern and output flange configuration against your specific vehicle chassis before ordering.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4657101049 | TRANSMISSION HOUSING | Main structural casing for gear cluster |
| 4657301130 | HOUS.FRONT SECT | Front section supporting input shaft |
| 4657301131 | HOUSING REAR PART | Rear section enclosing output shaft |
| 0631306816 | CYLINDRICAL PIN | Alignment dowel for housing halves |
| 0636102489 | CAP SCREW | Fastener for housing assembly |
| 4656301148 | FIXING PLATE | Locks bearing in position |
| 0636102463 | CAP SCREW | Mounting bolt for valve body |
| 4657201133 | SCREEN SHEET | Filter mesh for hydraulic circuit |
| 0636115287 | CAP SCREW | High-tensile bolt for clutch pack |
| 4657301065 | PLATE | Thrust washer for planetary gear |
