Overview
The ZF 4657.056.304 6 WG 210 Powershift Transmission Assembly is a complete, factory-matched unit designed for heavy-duty off-highway applications. This SKU 4657.056.304 integrates the planetary gear sets, clutch packs, and hydraulic control system into a single drop-in assembly. It sits as the central power transfer module between the engine and driveline, managing torque distribution across six forward speeds. When rebuilding a WG 210 series transmission, this complete unit eliminates the need for piecemeal component sourcing, ensuring precise gear alignment and hydraulic pressure integrity. The assembly interfaces directly with the TRANSMISSION HOUSING to form the structural backbone of the gearbox.
Symptoms of Failure
- Delayed or harsh engagement: Worn clutch packs inside the assembly cause hesitation when shifting from neutral to drive, often accompanied by a jarring thud. This symptom typically appears after 8,000–10,000 operating hours.
- Torque converter shudder under load: Internal seal degradation leads to pressure loss, producing a vibration during low-speed maneuvering or when climbing grades.
- External oil seepage at housing joints: Cracks in the assembly body or degraded gaskets allow ATF to weep around the HOUS.FRONT SECT and HOUSING REAR PART interfaces, leaving visible drips on the bell housing.
- Intermittent loss of forward or reverse gears: Sprag clutch failure within the assembly causes the transmission to suddenly drop into neutral, requiring immediate rebuild or replacement.
Technical Specifications
| Parameter | Value |
|---|---|
| OEM Part Number | 4657.056.304 |
| Assembly Type | 6 WG 210 Powershift (Complete Unit) |
| Dry Weight | 285 kg (628 lbs) |
| Overall Length | 720 mm |
| Housing Material | High-tensile cast iron (EN-GJS-500-7) |
| Max Input Torque | 2,100 Nm |
| Bolt Torque Spec (Housing) | 120 Nm ±10% |
| Sealing Compound Required | SURFACE SEALING COMPOUND (Loctite equivalent) |
Compatibility
This complete unit is engineered for the ZF WG 210 series, but its core architecture shares mounting patterns with the WG 180 and WG 200 families. It directly replaces units in 6 WG 210 configurations found in loaders, graders, and industrial tractors from 2015 onward. The assembly is not backward-compatible with pre-2010 WG 160 models due to different bell housing bolt patterns. Always verify the TRANSMISSION HOUSING casting number before installation to confirm fitment.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4657101086 | TRANSMISSION HOUSING | Main structural casing for gear train |
| 4657201176 | HOUS.FRONT SECT | Front section housing torque converter |
| 0666790033 | SURFACE SEALING COMPOUND | Gasket eliminator for mating surfaces |
| 4657201179 | HOUSING REAR PART | Rear section supporting output shaft |
| 4657298110 | HOUSING REAR SECTION | Alternate rear housing variant |
| 0636115293 | 螺栓 | M12 flange bolt for housing fastening |
| 0634313603 | O-RING | Hydraulic circuit seal |
| 0631306816 | CYLINDRICAL PIN | Alignment dowel for housing halves |
| 0636100801 | CAP SCREW | High-strength fastener for clutch packs |
| 4656301148 | FIXING PLATE | Retainer for planetary gear set |
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