Overview
The ZF 4657.056.044 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 components within a single, pre-tested housing. As the core of the WG 210 series, it manages torque distribution across six forward speeds and one reverse speed. The SKU 4657.056.044 identifies this specific assembly variant, which is engineered to match OEM specifications for loaders, graders, and industrial tractors. When installing this unit, ensure the TRANSMISSION HOUSING is free of cracks and the HOUS.FRONT SECT aligns correctly to prevent misalignment.
Symptoms of Failure
- Erratic gear engagement or slipping under load: Worn clutch discs or hydraulic seal degradation inside the assembly cause delayed shifts or complete loss of drive in specific gears.
- Internal oil leaks and low pressure warnings: Cracks in the HOUSING REAR PART or damaged gaskets allow transmission fluid to bypass, leading to overheating and erratic shift timing.
- Metallic grinding noises during operation: Failed bearings or chipped gear teeth within the assembly produce distinct whining or grinding sounds, especially when transitioning between forward and reverse.
- Torque converter shudder or stall: A failing lock-up clutch or contaminated hydraulic circuits cause vibration during acceleration and reduced power transfer efficiency.
Technical Specifications
| Parameter | Specification |
|---|---|
| Assembly Weight (dry) | Approx. 185 kg (408 lbs) |
| Overall Length | 720 mm |
| Overall Width | 480 mm |
| Overall Height | 410 mm |
| Housing Material | High-strength cast iron (GGG-40) |
| OEM Reference | ZF 4657.056.044 |
| Bolt Torque (main housing) | 120 Nm (use CAP SCREW M12 x 1.5) |
| Oil Capacity (system) | 18.5 liters (ATF Dexron III) |
Compatibility
This complete unit is designed exclusively for the ZF WG 210 series powershift transmissions. It is directly compatible with WG 180, WG 200, and WG 211 variants when used with the correct CYLINDRICAL PIN alignment kit. The assembly also fits select models in the WG 120 and WG 150 families, though a FIXING PLATE adapter may be required for non-standard bellhousing configurations. Always verify the spline count and clutch pack stack height against your original unit before installation.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4657101039 | TRANSMISSION HOUSING | Main structural casing for gear train |
| 4657201028 | HOUS.FRONT SECT | Front section housing torque converter |
| 4657201013 | HOUSING REAR PART | Rear section supporting output shaft |
| 0631306792 | CYLINDRICAL PIN | Alignment dowel for housing mating |
| 0636100801 | CAP SCREW | M12 bolt for housing fastening |
| 4656301148 | FIXING PLATE | Retainer for clutch pack assembly |
| 4657301034 | SCREEN SHEET | Fine mesh filter for oil circuit |
| 4657301035 | SCREEN SHEET | Coarse mesh pre-filter |
| 0636100803 | CAP SCREW | M10 bolt for cover plate |
| 4681301040 | OIL FEED.HOUSG. | Lubrication supply manifold |
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