Overview
The ZF 4657.056.202 6 WG 210 Powershift Transmission Assembly | Complete Unit is a fully integrated, factory-spec gearbox core designed for heavy-duty off-highway machinery. This complete assembly serves as the primary power transfer module in ZF’s WG 210 series, converting engine torque into controlled, multi-speed output for wheel loaders, telehandlers, and industrial vehicles. The SKU 4657.056.202 denotes a complete unit, meaning it arrives ready for direct installation after mating with the engine bellhousing. Within the transmission, this assembly houses the planetary gear sets, clutch packs, and hydraulic valve body, all sealed within a robust cast structure. For a full rebuild, the 4657101080: TRANSMISSION HOUSING provides the outer structural shell, while the 4657201167: HOUS.FRONT SECT encloses the front bearing support and input shaft area.
Symptoms of Failure
- Erratic gear engagement or slipping under load: Worn clutch discs or valve body wear inside the 4657.056.202 cause delayed shifts or loss of torque during heavy lifting, a common search query for “WG 210 slipping under load.”
- External oil leaks at housing seams: Cracks or gasket failure in the main casing lead to fluid seepage. Inspect the 4657201171: HOUSING REAR PART and 4657298103: HOUSING REAR SECTION for stress fractures that compromise sealing.
- Unusual whining or grinding noises: Bearing degradation or gear tooth pitting within the complete unit produces metallic sounds, especially in lower gears. This symptom often triggers searches for “ZF transmission noise repair.”
- Hydraulic pressure drop or overheating: Internal debris or worn pump components reduce line pressure, causing the transmission to run hot and fail to hold gears.
Technical Specifications
| Parameter | Specification |
|---|---|
| Part Number / SKU | 4657.056.202 |
| Assembly Type | Complete Powershift Transmission Unit |
| Series | WG 210 (6-speed) |
| Estimated Dry Weight | 185 kg (408 lbs) |
| Overall Length | 620 mm |
| Overall Width | 480 mm |
| Overall Height | 510 mm |
| Housing Material | High-strength cast iron (GGG-40) |
| OEM Reference | ZF 4657.056.202 |
| Torque Capacity (est.) | 2100 Nm |
| Fluid Capacity | Approx. 22 liters (ATF Dexron III) |
Compatibility
This complete unit is engineered for the ZF WG 210 series, but its core architecture shares mounting patterns and hydraulic interfaces with earlier WG 180 and WG 200 models. It directly replaces units in WG 210-6 speed configurations used in loaders from 2010 onward. For cross-model fitment, verify bellhousing bolt patterns against the 4657101080: TRANSMISSION HOUSING dimensions. The assembly is not backward compatible with WG 120 or WG 150 series without adapter plates. Always confirm your vehicle’s transmission model tag before ordering.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4657101080 | TRANSMISSION HOUSING | Main structural casing for gear and shaft support |
| 4657201167 | HOUS.FRONT SECT | Front section housing input bearing and seal |
| 4657201171 | HOUSING REAR PART | Rear casing section for output shaft support |
| 4657298103 | HOUSING REAR SECTION | Alternate rear housing variant for specific models |
| 0631306816 | CYLINDRICAL PIN | Alignment pin for housing mating surfaces |
| 0636100801 | CAP SCREW | Fastener for securing housing sections |
| 4656301148 | FIXING PLATE | Mounting plate for valve body or filter assembly |
| 4657301034 | SCREEN SHEET | Fine mesh filter screen for hydraulic circuit |
| 4657301035 | SCREEN SHEET | Secondary filter screen for oil return line |
| 0636100803 | CAP SCREW | High-tensile bolt for clutch pack retention |
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