Overview
The ZF 4657.056.049 6 WG 210 Powershift Transmission Assembly is a complete, factory-engineered unit designed for heavy-duty off-highway applications. This assembly integrates the full clutch pack, planetary gear sets, 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, ensuring smooth power delivery under extreme loads. The SKU 4657.056.049 is the definitive replacement for worn-out transmissions, restoring original ZF performance without the need for piecemeal repairs. This unit sits directly between the engine bellhousing and the final drive, requiring precise alignment with the TRANSMISSION HOUSING to maintain structural integrity.
Symptoms of Failure
- Erratic gear engagement and slipping under load: When the internal clutch packs or hydraulic seals degrade, the transmission fails to hold torque, causing RPM flare-ups and delayed shifts. This is a common sign that the 4657.056.049 assembly requires replacement.
- External oil leaks from the main case joints: Worn gaskets or cracked castings around the HOUS.FRONT SECT or the HOUSING REAR PART allow hydraulic fluid to escape, leading to low pressure and eventual transmission failure.
- Metallic grinding or whining noises during operation: Bearing wear or planetary gear damage within the assembly produces audible distress, often accompanied by vibration through the chassis.
- Complete loss of forward or reverse drive: A seized or broken internal component can render the unit inoperable, necessitating a full assembly swap.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number | 4657.056.049 |
| Assembly Type | Complete Powershift Transmission |
| Weight (approx.) | 285 kg (628 lbs) |
| Dimensions (L x W x H) | 720 mm x 480 mm x 520 mm |
| Material | High-strength cast iron housing with hardened steel gears |
| OEM Reference | ZF 6 WG 210 |
| Number of Speeds | 6 Forward / 1 Reverse |
| Max Input Torque | 2,100 Nm |
| Hydraulic Fluid Capacity | 22 liters (ZF TE-ML 03C) |
Compatibility
This complete unit is specifically engineered for the ZF WG 210 series, but it also serves as a direct replacement for earlier WG 180 and WG 200 models when paired with the correct adapters. It is commonly found in ZF 6 WG 210, 6 WG 180, and 6 WG 200 transmissions used in telehandlers, wheel loaders, and dump trucks. For a secure installation, ensure the CYLINDRICAL PIN is properly aligned during mounting to prevent misalignment of the hydraulic passages.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4657101037 | TRANSMISSION HOUSING | Main structural casing for gear and clutch support |
| 4657201027 | HOUS.FRONT SECT | Front section housing input shaft and pump drive |
| 4657201012 | HOUSING REAR PART | Rear section supporting output shaft and parking brake |
| 0631306792 | CYLINDRICAL PIN | Alignment dowel for precise housing mating |
| 0636100801 | CAP SCREW | Fastener for securing housing sections |
| 4656301148 | FIXING PLATE | Locks clutch pack retaining nuts |
| 4657301032 | SCREEN SHEET | Fine mesh filter for hydraulic circuit |
| 4657301033 | SCREEN SHEET | Coarse mesh pre-filter for oil return |
| 0636100803 | CAP SCREW | Bolt for valve body attachment |
| 4656301048 | OIL FEED.HOUSG. | Distributes pressurized oil to clutch packs |
