Overview
The ZF 4657.056.037 6 WG 210 Powershift Transmission Assembly | Complete Unit is a fully integrated, factory-assembled gearbox core designed for heavy-duty off-highway machinery. This complete unit serves as the primary power transfer module within the WG 210 series, managing torque distribution across six forward speeds. The SKU 4657.056.037 identifies a direct replacement assembly that includes the main housing, clutch packs, and planetary gear sets. It sits centrally in the driveline, connecting the engine output to the final drive. For structural integrity, this assembly mates with the TRANSMISSION HOUSING and the HOUS.FRONT SECT to form a sealed, pressurized oil chamber.
Symptoms of Failure
- Delayed or harsh gear engagement: When the complete unit wears, internal clutch clearance increases, causing noticeable lag or jarring shifts during direction changes.
- Chronic oil leaks at housing seams: Fatigue in the main casing or misalignment with the HOUSING REAR PART leads to external fluid seepage, often mistaken for simple seal failure.
- Loss of power under load: Worn planetary bearings or damaged gear teeth within the assembly result in torque slip, particularly when climbing grades or pushing heavy loads.
- Metallic grinding noise from the bell housing: Debris from failing components, often originating near the CYLINDRICAL PIN alignment points, produces a distinct whine or grind during operation.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number | 4657.056.037 |
| Assembly Type | Complete Powershift Unit (6 WG 210) |
| Overall Length | 720 mm (estimated) |
| Dry Weight | 185 kg (estimated) |
| Primary Material | High-grade cast iron with steel planetary carriers |
| OEM Reference | ZF 6 WG 210 Series |
| Max Input Torque | 1,200 Nm (estimated) |
| Oil Capacity | 14 liters (estimated) |
Compatibility
This complete unit is engineered for the ZF WG 210 transmission series. It is directly compatible with models including WG180, WG200, and WG210 used in telehandlers, wheel loaders, and agricultural tractors. The assembly also fits select variants of the WG 150 series with minor adapter modifications. Always verify housing bolt patterns against the TRANSMISSION HOUSING and the HOUS.FRONT SECT for exact fitment.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4657101039 | TRANSMISSION HOUSING | Main structural casing for gear train |
| 4657201028 | HOUS.FRONT SECT | Front section housing for input shaft |
| 4657201013 | HOUSING REAR PART | Rear section supporting output flange |
| 0631306792 | CYLINDRICAL PIN | Alignment dowel for housing assembly |
| 0636100801 | CAP SCREW | Fastener for housing joints |
| 4656301148 | FIXING PLATE | Locks bearing preload in place |
| 4657301034 | SCREEN SHEET | Fine mesh filter for oil circuit |
| 4657301035 | SCREEN SHEET | Coarse mesh pre-filter for sump |
| 0636100803 | CAP SCREW | High-torque fastener for clutch packs |
| 4681301040 | OIL FEED.HOUSG. | Distributes pressurized oil to clutches |
