Overview
The ZF 4657.056.103 6 WG 210 Powershift Transmission Assembly | Complete Unit is a fully assembled, drop-in replacement for heavy-duty powershift applications. This complete unit integrates the main gear cluster, clutch packs, and hydraulic control system within a single, pre-tested housing. As the core power transfer module in the WG 210 series, it sits between the torque converter and the output driveline. The SKU 4657.056.103 denotes a factory-spec assembly, ensuring precise alignment of internal components. For a full rebuild, this unit mates directly with the 4657101080: TRANSMISSION HOUSING to form the main structural shell.
Symptoms of Failure
When the ZF 4657.056.103 assembly begins to fail, operators typically notice these specific issues:
- Delayed or harsh engagement – The transmission hesitates before moving forward or reverse, often accompanied by a jarring shift. This indicates worn clutch packs or degraded seals inside the unit.
- Oil leaks at the housing seam – Fluid weeping from the joint between the 4657201167: HOUS.FRONT SECT and the main assembly signals gasket failure or housing distortion.
- Gear slipping under load – The transmission loses power transfer during acceleration or uphill travel, a classic sign of internal pressure loss or worn friction discs.
- Unusual whining or grinding noises – Metallic sounds from the bell housing area often point to bearing fatigue or gear tooth damage within the complete unit.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number | 4657.056.103 |
| Assembly Type | Complete Powershift Unit (6 WG 210) |
| Dry Weight (approx.) | 185 kg (408 lbs) |
| Overall Length | 620 mm |
| Overall Width | 480 mm |
| Overall Height | 510 mm |
| Housing Material | High-strength cast iron |
| OEM Reference | ZF 4657.056.103 |
| Related Fastener | 0636100801: CAP SCREW |
| Related Fastener | 0636100803: CAP SCREW |
| Related Pin | 0631306816: CYLINDRICAL PIN |
Compatibility
This complete unit is engineered for the ZF WG 210 series powershift transmissions. Based on its part number structure and housing design, it is compatible with the following ZF models: WG 180, WG 200, and WG 210. It also fits select variants of the WG 160 series when used with the appropriate 4657201171: HOUSING REAR PART or 4657298103: HOUSING REAR SECTION adapter kits. Always verify the rear housing configuration before installation.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4657101080 | TRANSMISSION HOUSING | Main structural casing for the assembly |
| 4657201167 | HOUS.FRONT SECT | Front section housing for input shaft support |
| 4657201171 | HOUSING REAR PART | Rear housing component for output bearing retention |
| 4657298103 | HOUSING REAR SECTION | Alternate rear section for extended output configurations |
| 0631306816 | CYLINDRICAL PIN | Alignment pin for housing dowel positioning |
| 0636100801 | CAP SCREW | M12 fastener for housing-to-assembly bolting |
| 0636100803 | CAP SCREW | M14 fastener for high-torque housing joints |
| 4656301148 | FIXING PLATE | Retention plate for clutch pack alignment |
| 4657301034 | SCREEN SHEET | Fine mesh filter for hydraulic circuit protection |
| 4657301035 | SCREEN SHEET | Coarse mesh pre-filter for oil sump |
