Overview
The ZF 4657.056.157 6 WG 210 Powershift Transmission Assembly | Complete Unit is a fully assembled, drop-in replacement for heavy-duty off-highway applications. This complete unit integrates the main gear cluster, 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 and one reverse speed. The SKU 4657.056.157 designates a factory-spec assembly, ensuring precise alignment with the TRANSMISSION HOUSING and the HOUS.FRONT SECT to maintain structural integrity under high load cycles.
Symptoms of Failure
- Delayed or harsh gear engagement: Worn clutch discs or seal rings inside the assembly cause hesitation when shifting from neutral to drive, often accompanied by a loud clunk.
- Internal oil leaks and low pressure: Cracks in the HOUSING REAR PART or degraded gaskets allow transmission fluid to bypass, leading to erratic shift timing and visible drips under the bell housing.
- Torque converter shudder at low RPM: A failing stator or worn pump drive within the assembly creates vibration during inching maneuvers, particularly in loader or dozer applications.
- Metal debris in the oil pan: Advanced wear of planetary gears or bearings produces fine metallic particles, which can clog the HOUSING REAR SECTION oil passages and accelerate component failure.
Technical Specifications
| Parameter | Value |
|---|---|
| Assembly Weight (dry) | 185 kg (408 lbs) |
| Overall Length | 720 mm |
| Overall Width | 480 mm |
| Overall Height | 510 mm |
| Housing Material | High-strength cast iron (GGG-40) |
| OEM Reference | ZF 4657.056.157 |
| Max Input Torque | 2,100 Nm |
| Fluid Capacity | 22 liters (SAE 10W-30) |
Compatibility
This complete unit is engineered for the ZF WG 210 series, but it also directly replaces assemblies in the WG 180 and WG 200 families when the bell housing pattern matches. It is commonly found in WG 211 and WG 212 variants used in telehandlers, wheel loaders, and agricultural tractors. Always verify the clutch pack count (6 forward / 1 reverse) against your original unit before installation.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4657101080 | TRANSMISSION HOUSING | Main structural casing for gear train |
| 4657201167 | HOUS.FRONT SECT | Front section supporting input shaft |
| 4657201171 | HOUSING REAR PART | Rear casing for output shaft and PTO |
| 4657298103 | HOUSING REAR SECTION | Lower rear section for oil sump |
| 0631306816 | CYLINDRICAL PIN | Alignment dowel for housing halves |
| 0636100801 | CAP SCREW | M12 bolt for housing fastening |
| 4656301148 | FIXING PLATE | Locks clutch pack retaining nuts |
| 4657301034 | SCREEN SHEET | Fine mesh filter for oil return |
| 4657301035 | SCREEN SHEET | Coarse mesh pre-filter for pump |
| 0636100803 | CAP SCREW | M10 bolt for valve body mounting |
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