Overview
The ZF 4657.056.212 6 WG 210 Powershift Transmission Assembly is a complete, factory-matched unit designed for heavy-duty off-highway applications. 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 210 series, it manages torque distribution across six forward speeds, ensuring smooth power delivery under extreme loads. The SKU 4657.056.212 replaces worn or failed assemblies, restoring original ZF performance. This unit is typically mounted between the engine bellhousing and the final drive, and it works in concert with the 4657101082: TRANSMISSION HOUSING to protect internal components from debris and stress.
Symptoms of Failure
- Erratic gear engagement or slipping under load — Worn clutch discs or valve body degradation cause the transmission to hesitate or lose torque during acceleration, especially on inclines.
- Hydraulic fluid leaks from the main casing — Cracks in the 4657201166: HOUS.FRONT SECT or 4657201170: HOUSING REAR PART allow ATF to escape, leading to low pressure and eventual gearbox seizure.
- Unusual whining or grinding noises — Bearing fatigue or gear tooth pitting produces metallic sounds that intensify with engine RPM, signaling imminent internal failure.
- Delayed or harsh shifting — Accumulated wear in the 4657298102: HOUSING REAR SECTION can misalign shift rails, causing jarring transitions between forward and reverse.
Technical Specifications
| Parameter | Value |
|---|---|
| Overall Length | 720 mm |
| Overall Width | 480 mm |
| Overall Height | 410 mm |
| Dry Weight | 185 kg |
| Housing Material | High-strength aluminum alloy (A356-T6) |
| OEM Reference | ZF 4657.056.212 |
| Max Input Torque | 2,100 Nm |
| Fluid Capacity | 18.5 liters |
| Bolt Torque Spec | 120 Nm (M12 fasteners) |
Compatibility
This complete unit is engineered for the ZF WG 210 series powershift transmissions. It is directly compatible with models WG180, WG200, and WG210 used in construction loaders, forklifts, and agricultural tractors. The assembly also fits select ZF 4WG-200 and 6WG-210 variants. Always verify the housing configuration—units with the 4657101082: TRANSMISSION HOUSING require the corresponding front and rear sections listed above for proper sealing.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4657101082 | TRANSMISSION HOUSING | Main structural casing for gear train |
| 4657201166 | HOUS.FRONT SECT | Front section housing input shaft |
| 4657201170 | HOUSING REAR PART | Rear section supporting output flange |
| 4657298102 | HOUSING REAR SECTION | Extended rear housing for PTO mounting |
| 0631306816 | CYLINDRICAL PIN | Alignment pin for housing dowels |
| 0636100801 | CAP SCREW | M12 bolt for housing fastening |
| 4656301148 | FIXING PLATE | Retains clutch pack assembly |
| 4657301032 | SCREEN SHEET | Fine mesh filter for hydraulic circuit |
| 4657301033 | SCREEN SHEET | Coarse mesh pre-filter for sump |
| 0636100803 | CAP SCREW | M10 bolt for valve body mounting |
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