Overview
The ZF 4657.056.206 6 WG 210 Powershift Transmission Assembly | Complete Unit is a fully assembled, drop-in replacement for heavy-duty off-highway vehicles. As the central torque-converter and gearbox module in the WG 210 series, this complete unit integrates the planetary gear sets, clutch packs, and hydraulic control valve body. The SKU 4657.056.206 designates a factory-remanufactured or new assembly, ensuring precise alignment of all rotating components. It sits between the engine bellhousing and the final drive, managing power distribution across six forward and three reverse speeds. For structural integrity, this unit mates directly with the 4657101080: TRANSMISSION HOUSING and the 4657201167: HOUS.FRONT SECT to form the main casing.
Symptoms of Failure
- Erratic gear engagement or slipping under load: Worn clutch discs or degraded seals inside the assembly cause delayed shifts or complete loss of drive, especially in reverse.
- External oil leaks at the housing seam: Cracks or gasket failure in the 4657201171: HOUSING REAR PART or the 4657298103: HOUSING REAR SECTION allow ATF to escape, leading to low pressure and overheating.
- Unusual whining or grinding noises: Bearing wear or planetary gear damage within the complete unit produces metallic sounds during acceleration or deceleration.
- Torque converter shudder: A failing stator or lock-up clutch inside the assembly causes vibration at specific RPM ranges.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number | 4657.056.206 |
| Assembly Type | Complete Powershift Unit (6 WG 210) |
| Overall Length | ~720 mm (28.3 in) |
| Dry Weight | ~195 kg (430 lbs) |
| Housing Material | Cast Iron (GGG-40) |
| OEM Reference | ZF 6 WG 210 |
| Torque Capacity | 2,100 Nm (1,549 lb-ft) |
| Fluid Capacity | ~18 L (4.75 gal) |
Compatibility
This complete unit is engineered for the ZF WG 210 series, but its core architecture is shared across the WG 180, WG 200, and WG 250 families. It directly replaces units in WG 180 and WG 200 transmissions with identical bolt patterns and hydraulic porting. The assembly is also backward-compatible with certain WG 160 applications when paired with the correct adapter plate. Always verify the bellhousing pattern and output flange configuration before installation.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4657101080 | TRANSMISSION HOUSING | Main structural casing for gear train |
| 4657201167 | HOUS.FRONT SECT | Front section enclosing torque converter |
| 4657201171 | HOUSING REAR PART | Rear casing for output shaft support |
| 4657298103 | HOUSING REAR SECTION | Extended rear cover for PTO mounting |
| 0631306816 | CYLINDRICAL PIN | Alignment dowel for housing assembly |
| 0636100801 | CAP SCREW | M12 bolt for housing fastening |
| 4656301148 | FIXING PLATE | Locks clutch pack retaining nuts |
| 4657301034 | SCREEN SHEET | Fine mesh filter for oil sump |
| 4657301035 | SCREEN SHEET | Coarse mesh pre-filter for pump |
| 0636100803 | CAP SCREW | M10 bolt for valve body mounting |
