Overview
The ZF 4657.056.062 6 WG 210 Powershift Transmission Assembly is a complete, factory-matched unit designed for heavy-duty off-highway applications. As the core hydraulic-mechanical assembly in the WG 210 series, this unit integrates the torque converter, clutch packs, and planetary gear sets into a single, ready-to-install package. The SKU 4657.056.062 identifies a fully assembled powershift transmission, eliminating the need for piecemeal component sourcing. It sits as the central driveline module, transferring engine power through six forward speeds and one reverse speed. For maximum rebuild integrity, this assembly is often paired with a new TRANSMISSION HOUSING to ensure precise alignment of all internal components.
Symptoms of Failure
- Erratic gear engagement or slipping under load: Worn clutch discs or degraded seals inside the 4657.056.062 assembly cause delayed or incomplete shifts, especially in higher gears.
- Hydraulic oil leaks at the front or rear bell housing: Cracks in the HOUS.FRONT SECT or HOUSING REAR PART allow pressurized ATF to escape, leading to low line pressure and eventual transmission failure.
- Loud whining or grinding noises during neutral-to-drive shifts: Damaged planetary bearings or a failing torque converter stator produce metallic sounds that worsen with engine RPM.
- Transmission overheating despite proper fluid levels: Internal contamination or a blocked SCREEN SHEET restricts oil flow, causing thermal runaway in the clutch packs.
Technical Specifications
| Part Number | 4657.056.062 |
| Assembly Type | Complete Powershift Transmission (6 WG 210) |
| Dry Weight | Approx. 285 kg (628 lbs) |
| Overall Length | 720 mm |
| Housing Material | High-strength cast iron (GGG-40) |
| Max Input Torque | 1,200 Nm |
| OEM Reference | ZF 6 WG 210 |
| Fluid Capacity | 22 liters (ATF Dexron III) |
| Bolt Torque Spec | M12 cap screws: 80 Nm (use CAP SCREW 0636100801) |
Compatibility
This complete unit is engineered for the ZF WG 210 series, but it also serves as a direct replacement in select WG 180 and WG 200 applications when the bell housing pattern matches. It is commonly installed in ZF 6 WG 210, 6 WG 200, and 6 WG 180 transmissions found in telehandlers, wheel loaders, and rough-terrain forklifts. The assembly uses a CYLINDRICAL PIN for precise dowel alignment between the front and rear housing sections. Always verify the spline count on the output shaft before ordering.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4657101039 | TRANSMISSION HOUSING | Main structural casing for gear train |
| 4657201028 | HOUS.FRONT SECT | Front bell housing section |
| 4657201013 | HOUSING REAR PART | Rear output housing section |
| 0631306792 | CYLINDRICAL PIN | Alignment dowel for housing halves |
| 0636100801 | CAP SCREW | M12 bolt for housing fastening |
| 4656301148 | FIXING PLATE | Locks clutch piston in place |
| 4657301034 | SCREEN SHEET | Fine mesh oil filter (inner) |
| 4657301035 | SCREEN SHEET | Fine mesh oil filter (outer) |
| 0636100803 | CAP SCREW | M10 bolt for valve body |
| 4681301040 | OIL FEED.HOUSG. | Pressurized oil distribution manifold |
