Overview
The ZF 4657.056.041 6 WG 210 Powershift Transmission Assembly | Complete Unit is a fully integrated, factory-assembled gearbox core designed for heavy-duty off-highway applications. This complete unit serves as the central power transfer module within the WG 210 series, managing torque distribution across six forward speeds and one reverse range. The SKU 4657.056.041 replaces the entire transmission assembly, including the main housing, clutch packs, and hydraulic valve body. It sits directly between the engine flywheel housing and the final drive, converting engine RPM into usable tractive effort. For a full rebuild, this assembly must be paired with a new TRANSMISSION HOUSING to ensure proper alignment of all internal components.
Symptoms of Failure
- Delayed or harsh engagement: When the complete unit wears, operators experience a noticeable lag between shifting and power delivery, often accompanied by a jarring clunk. This indicates internal clutch pack wear or hydraulic pressure loss within the assembly.
- External oil seepage at housing joints: Cracks or warpage in the main casing cause fluid to weep around the mating surfaces of the HOUS.FRONT SECT and the HOUSING REAR PART, leading to low oil levels and eventual gear slipping.
- Intermittent loss of forward or reverse: A failing assembly may suddenly drop a range during operation, particularly under load. This symptom often traces back to a broken CYLINDRICAL PIN that secures the shift fork rail.
- Unusual whining or grinding noises: Worn bearings or damaged gear teeth inside the complete unit produce a high-pitched whine that increases with engine speed, signaling imminent internal failure.
Technical Specifications
| Specification | Detail |
|---|---|
| Part Number | 4657.056.041 |
| Assembly Type | Complete Powershift Transmission |
| Series | WG 210 |
| Number of Speeds | 6 Forward / 1 Reverse |
| Dry Weight (approx.) | 385 kg (849 lbs) |
| Overall Length | 820 mm |
| Overall Width | 510 mm |
| Overall Height | 590 mm |
| Housing Material | Cast Iron (GGG-40) |
| OEM Reference | ZF 4657.056.041 |
| Max Input Torque | 2,100 Nm |
| Oil Capacity | 28 liters |
Compatibility
This complete unit is engineered specifically for the ZF WG 210 series. It is directly compatible with WG 180, WG 200, and WG 210 models manufactured after 2005. The assembly also fits select WG 211 variants used in wheel loaders and telehandlers. Always verify the bell housing pattern and output flange dimensions against your existing unit before installation.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4657101033 | TRANSMISSION HOUSING | Main structural casing for gear train |
| 4657201027 | HOUS.FRONT SECT | Front section housing input shaft and pump drive |
| 4657201012 | HOUSING REAR PART | Rear section supporting output shaft and PTO |
| 0631306792 | CYLINDRICAL PIN | Alignment pin for housing mating surfaces |
| 0636100801 | CAP SCREW | Fastener for housing bolts (M12 x 1.5) |
| 4656301148 | FIXING PLATE | Locks bearing retaining nuts |
| 4657301032 | SCREEN SHEET | Fine mesh filter for oil return line |
| 4657301033 | SCREEN SHEET | Coarse mesh pre-filter for suction line |
| 0636100803 | CAP SCREW | Fastener for valve body (M10 x 1.25) |
| 4681301040 | OIL FEED.HOUSG. | Distributes pressurized oil to clutch packs |
