Overview
The ZF 4657.056.186 6 WG 210 Powershift Transmission Assembly | Complete Unit is a fully assembled, drop-in replacement for heavy-duty off-highway vehicles. This complete unit integrates the main gear cluster, clutch packs, and hydraulic control system within a single, pre-tested assembly. As the core power transfer module for the WG 210 series, it eliminates the need for piecemeal rebuilding. The SKU 4657.056.186 designates a factory-spec complete unit, ensuring direct compatibility with the original drivetrain layout. It sits between the torque converter and the output flange, managing all six forward speeds and one reverse gear under high load conditions.
Symptoms of Failure
- Delayed or harsh engagement: When the complete unit wears internally, operators experience a noticeable lag or a violent clunk when shifting from neutral to drive or reverse, indicating worn clutch discs or degraded seals.
- Intermittent gear slipping under load: A failing assembly will cause the transmission to momentarily lose power delivery during uphill climbs or heavy hauling, often accompanied by a rise in RPM without corresponding vehicle speed.
- Chronic hydraulic fluid contamination: Internal wear generates metallic debris that bypasses the filter, leading to dark, burnt-smelling oil and reduced shift quality across all ranges.
- External oil seepage from bell housing area: Cracks in the main casing or worn gaskets allow ATF to weep from the joint between the transmission and the engine, leaving visible drips after parking.
Technical Specifications
| Parameter | Specification |
|---|---|
| OEM Part Number | 4657.056.186 |
| Assembly Type | Complete Powershift Unit (6 WG 210) |
| Overall Length (approx.) | 620 mm |
| Dry Weight (approx.) | 185 kg |
| Housing Material | High-strength cast iron |
| Number of Speeds | 6 Forward / 1 Reverse |
| Max Input Torque | 1,200 Nm (estimated) |
| OEM Reference | ZF WG 210 Series |
Compatibility
This complete unit is engineered specifically for the ZF WG 210 transmission series. It is also a direct fit for the WG 180 and WG 200 models when used in identical chassis configurations, as these share the same bell housing bolt pattern and main shaft spline count. The assembly is commonly found in ZF WG 211 and WG 212 variants used in agricultural tractors and material handlers. Always verify the original transmission tag before ordering.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4657101082 | TRANSMISSION HOUSING | Main structural casing for the gear train |
| 4657201166 | HOUS.FRONT SECT | Front section housing the input shaft bearings |
| 4657201170 | HOUSING REAR PART | Rear casing supporting the output shaft assembly |
| 4657298102 | HOUSING REAR SECTION | Intermediate rear section for clutch pack retention |
| 0631306816 | CYLINDRICAL PIN | Alignment pin for housing mating surfaces |
| 0636100801 | CAP SCREW | Fastener for securing housing sections |
| 4656301148 | FIXING PLATE | Locking plate for critical bolt retention |
| 4657301032 | SCREEN SHEET | Fine mesh filter for hydraulic circuit |
| 4657301033 | SCREEN SHEET | Secondary mesh filter for return line |
| 0636100803 | CAP SCREW | High-tensile bolt for clutch pack retention |
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