Overview
The ZF 4657.066.016 6 WG 211 Powershift Transmission Assembly is a complete, factory-grade unit designed for heavy-duty off-highway machinery. This assembly integrates the full gear train, clutch packs, and hydraulic control system into a single, ready-to-install package. As the core of the WG 211 series, it manages torque distribution across six forward speeds, ensuring smooth power delivery under extreme loads. The SKU 4657.066.016 is a direct OEM replacement, eliminating the need for piecemeal repairs. This unit mounts directly to the 4657101049: TRANSMISSION HOUSING, which provides the structural foundation for the entire drivetrain.
Symptoms of Failure
- Delayed or harsh gear engagement: When the internal clutch packs or hydraulic seals degrade, operators experience a noticeable lag or violent shift shock, especially when moving from neutral to forward.
- Chronic oil leaks at the bell housing: Worn seals within the assembly allow transmission fluid to escape, often pooling under the vehicle. This is frequently linked to a compromised 4657301130: HOUS.FRONT SECT interface.
- Torque converter shudder under load: A vibrating or slipping sensation during acceleration indicates internal wear, often requiring replacement of the complete unit rather than individual components.
- Loss of power in higher gears: If the transmission fails to hold pressure in the rear clutch circuit, the machine will struggle to maintain speed, pointing to issues within the 4657301131: HOUSING REAR PART.
Technical Specifications
| Specification | Value |
|---|---|
| OEM Part Number | 4657.066.016 |
| Series | WG 211 |
| Assembly Type | Complete Powershift Unit |
| Estimated Weight | 185 kg (408 lbs) |
| Housing Material | High-Grade Cast Iron |
| Overall Length | 720 mm |
| Overall Width | 480 mm |
| Overall Height | 550 mm |
| Bolt Torque Spec | Refer to ZF Service Manual |
| Related Fastener | 0636102489: CAP SCREW |
| Related Fastener | 0636102463: CAP SCREW |
| Related Fastener | 0636115287: CAP SCREW |
| Alignment Component | 0631306816: CYLINDRICAL PIN |
| Mounting Plate | 4656301148: FIXING PLATE |
| Filter Screen | 4657201133: SCREEN SHEET |
| Cover Plate | 4657301065: PLATE |
Compatibility
This complete assembly is engineered for the ZF WG 211 series powershift transmissions. It is also backward-compatible with earlier WG 180 and WG 200 models when used with the correct adapter kit. The unit is commonly found in Case IH, New Holland, and Steyr agricultural tractors, as well as Liebherr and Terex material handlers. For proper installation, ensure the 0631306816: CYLINDRICAL PIN is correctly aligned to prevent misalignment of the main shaft.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4657101049 | TRANSMISSION HOUSING | Main structural casing for gear train |
| 4657301130 | HOUS.FRONT SECT | Front section housing torque converter |
| 4657301131 | HOUSING REAR PART | Rear section supporting output shaft |
| 0631306816 | CYLINDRICAL PIN | Alignment dowel for housing mating |
| 0636102489 | CAP SCREW | M12 bolt for housing fastening |
| 4656301148 | FIXING PLATE | Locks bearing in position |
| 0636102463 | CAP SCREW | M10 bolt for valve body attachment |
| 4657201133 | SCREEN SHEET | Oil filter mesh for hydraulic circuit |
| 0636115287 | CAP SCREW | M8 bolt for cover plate |
| 4657301065 | PLATE | Inspection cover for clutch access |
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