Overview
The ZF 4657.056.085 6 WG 210 Powershift Transmission Assembly represents a complete, drop-in replacement unit engineered for heavy-duty industrial applications. As a fully assembled gearbox, this SKU 4657.056.085 integrates the main drive housing, clutch packs, and hydraulic control components into a single ready-to-install package. It sits at the core of the driveline, transferring engine torque through six forward speeds and one reverse gear via a modulated powershift system. This assembly is designed to interface directly with the TRANSMISSION HOUSING and the HOUS.FRONT SECT, ensuring precise alignment and oil distribution across all rotating elements.
Symptoms of Failure
- Erratic gear engagement or slipping under load: When the internal clutch packs or valve body wear, the transmission may hesitate or fail to hold gear during heavy pulling, often accompanied by a burning smell from overheated friction material.
- Hydraulic oil leaks at the rear seal: A failing complete unit often shows visible oil seepage around the HOUSING REAR PART interface, leading to low fluid levels and eventual torque converter starvation.
- Unusual whining or grinding noises: Worn planetary gearsets or damaged bearings within the assembly produce a distinct metallic whine that increases with engine RPM, signaling imminent internal failure.
- Delayed or harsh shifting: A failing unit may exhibit a pronounced lag between gear changes or a violent clunk, indicating degraded hydraulic pressure regulation or a stuck CYLINDRICAL PIN in the shift rail.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number | 4657.056.085 |
| Assembly Type | Complete Powershift Transmission |
| Series | WG 210 |
| Overall Length (approx.) | 720 mm |
| Dry Weight (approx.) | 185 kg |
| Housing Material | High-strength cast iron (GGG-40) |
| OEM Reference | ZF 6 WG 210 |
| Input Torque Capacity | 2100 Nm (max) |
| Oil Capacity | 12.5 liters (ZF TE-ML 03 fluid) |
Compatibility
This complete unit is specifically designed for the ZF WG 210 series, but its core architecture shares mounting patterns and hydraulic interfaces with the WG 180 and WG 200 families. It is a direct fit for ZF 6 WG 210 models used in wheel loaders, forklifts, and telehandlers from 2010 onward. The assembly also retrofits into certain WG 160 applications when paired with the correct FIXING PLATE adapter. Always verify bellhousing bolt patterns against your existing TRANSMISSION HOUSING before installation.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4657101039 | TRANSMISSION HOUSING | Main structural casing for gear and shaft support |
| 4657201028 | HOUS.FRONT SECT | Front section housing torque converter and pump |
| 4657201013 | HOUSING REAR PART | Rear casing enclosing output shaft and PTO |
| 0631306792 | CYLINDRICAL PIN | Alignment dowel for housing-to-housing precision |
| 0636100801 | CAP SCREW | M12 fastener for securing housing sections |
| 4656301148 | FIXING PLATE | Locating plate for valve body mounting |
| 4657301034 | SCREEN SHEET | Fine mesh filter for hydraulic oil circuit |
| 4657301035 | SCREEN SHEET | Coarse mesh pre-filter for sump pickup |
| 0636100803 | CAP SCREW | M10 bolt for clutch pack retention |
| 4681301040 | OIL FEED.HOUSG. | Pressurized oil distribution manifold |
