Overview
The ZF 4657.056.159 6 WG 210 Powershift Transmission Assembly | Complete Unit is a fully integrated drop-in replacement for heavy-duty powershift drivelines. As the central rotating assembly within the WG 210 series, this complete unit houses the planetary gear sets, clutch packs, and hydraulic control valving that manage torque distribution across six forward speeds. The SKU 4657.056.159 designates a factory-balanced assembly ready for direct installation, eliminating the need for piecemeal component matching. This assembly interfaces directly with the TRANSMISSION HOUSING to form the main structural envelope, while the HOUS.FRONT SECT and HOUSING REAR PART provide the precise alignment required for shaft concentricity.
Symptoms of Failure
- Delayed or harsh engagement between forward gears: Worn clutch discs or piston seal degradation inside the assembly cause hesitation or abrupt shifts, often accompanied by a momentary loss of tractive effort.
- Persistent internal oil leaks leading to low line pressure: Cracks in the carrier or worn thrust washers allow pressurized ATF to bypass, resulting in a gradual loss of hydraulic pressure and eventual transmission overheating.
- Audible whining or grinding from the bell housing area: Bearing fatigue within the 4657.056.159 unit produces a metallic noise that increases with engine RPM, indicating imminent planetary gear failure.
- Inability to hold gear under load on inclines: Slipping clutches inside the complete unit prevent torque lockup, causing the vehicle to roll back or lose speed on grades.
Technical Specifications
| Parameter | Specification |
|---|---|
| Part Number | 4657.056.159 |
| Assembly Type | Complete Powershift Unit (6-speed) |
| Dry Weight (approx.) | 185 kg (408 lbs) |
| Overall Length | 620 mm |
| Maximum Input Torque | 2,100 Nm |
| Housing Material | High-strength cast iron (GGG-40) |
| OEM Reference | ZF 6 WG 210 |
| Bolt Torque (housing-to-case) | 120 Nm (M12 cap screws) |
| Associated Fasteners | CAP SCREW (0636100801) and CAP SCREW (0636100803) |
| Alignment Components | CYLINDRICAL PIN (0631306816) |
| Mounting Hardware | FIXING PLATE (4656301148) |
| Filter Media | SCREEN SHEET (4657301034) and SCREEN SHEET (4657301035) |
Compatibility
This complete unit is engineered for the ZF WG 210 series, but its core architecture shares mounting patterns and spline counts with the WG 180 and WG 200 families. It is a direct fit for all 6 WG 210 variants used in agricultural tractors, wheel loaders, and industrial forklifts from 2015 onward. The assembly also retrofits into earlier WG 200 housings when paired with the HOUSING REAR SECTION adapter. Always verify the bell housing bolt pattern against your existing TRANSMISSION HOUSING before installation.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4657101080 | TRANSMISSION HOUSING | Main structural case enclosing the gear train |
| 4657201167 | HOUS.FRONT SECT | Front section supporting input shaft bearings |
| 4657201171 | HOUSING REAR PART | Rear section housing output shaft and PTO drive |
| 4657298103 | HOUSING REAR SECTION | Extended rear adapter for auxiliary drives |
| 0631306816 | CYLINDRICAL PIN | Precision alignment dowel for housing mating |
| 0636100801 | CAP SCREW | M12 fastener for housing-to-case joint |
| 4656301148 | FIXING PLATE | Locking plate securing clutch piston retainers |
| 4657301034 | SCREEN SHEET | Fine mesh filter for hydraulic return line |
| 4657301035 | SCREEN SHEET | Coarse mesh pre-filter for sump pickup |
| 0636100803 | CAP SCREW | M14 bolt for rear housing attachment |
