Overview
The ZF 4657.056.075 6 WG 210 Powershift Transmission Assembly | Complete Unit is a fully integrated drop-in replacement for heavy-duty powershift applications. This complete assembly serves as the central torque-converter and gearbox unit within the WG 210 series, managing power distribution from the engine to the driveline. The SKU 4657.056.075 denotes a factory-matched assembly that includes the main gear cluster, clutch packs, and hydraulic valve body. In a typical ZF transmission, this unit sits between the TRANSMISSION HOUSING and the HOUS.FRONT SECT, providing the structural core for all rotating components.
Symptoms of Failure
- Erratic gear engagement or slipping under load: Worn clutch discs or degraded seals inside the assembly cause the transmission to hesitate or lose torque during acceleration, especially in forward gears.
- Persistent oil leaks at the housing seam: Cracks or warpage in the main casing allow hydraulic fluid to escape, often visible as drips near the bell housing or around the HOUSING REAR PART.
- Unusual whining or grinding noises from the gear train: Bearing failure or misalignment of the CYLINDRICAL PIN can produce metallic sounds that worsen with engine RPM.
- Delayed or harsh shifting between ranges: Contaminated hydraulic passages or a failing torque converter lockup cause the transmission to shift abruptly or lag when changing speed ranges.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number | 4657.056.075 |
| Assembly Type | Complete Powershift Unit (6 WG 210) |
| Dry Weight | Approx. 185 kg (408 lbs) |
| Overall Length | 720 mm |
| Overall Width | 480 mm |
| Overall Height | 510 mm |
| Housing Material | Cast Iron (GGG-40) |
| OEM Reference | ZF 4657.056.075 |
| Bolt Torque Spec | 120 Nm (M12 fasteners) |
Compatibility
This complete unit is engineered for the ZF WG 210 series powershift transmissions. It is directly compatible with models including WG180, WG200, and WG210 used in construction loaders, forklifts, and agricultural tractors. The assembly also fits select variants of the WG160 and WG250 when paired with the correct TRANSMISSION HOUSING and HOUS.FRONT SECT. Always verify the bell housing pattern and input shaft spline count before installation.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4657101034 | TRANSMISSION HOUSING | Main structural casing for gear train |
| 4657201027 | HOUS.FRONT SECT | Front section housing torque converter |
| 4657201012 | HOUSING REAR PART | Rear casing supporting output shaft |
| 0631306792 | CYLINDRICAL PIN | Alignment dowel for housing assembly |
| 0636100801 | CAP SCREW | M12 fastener for housing bolts |
| 4656301148 | FIXING PLATE | Locks clutch pack retaining ring |
| 4657301032 | SCREEN SHEET | Fine mesh filter for hydraulic circuit |
| 4657301033 | SCREEN SHEET | Coarse mesh pre-filter for oil sump |
| 0636100803 | CAP SCREW | M10 fastener for valve body mounting |
| 4681301040 | OIL FEED.HOUSG. | Pressurized oil supply line to clutch pack |
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