Overview
The ZF 4616.000.225 4 WG 65 Powershift Transmission Assembly is a complete, factory-matched unit designed for heavy-duty off-highway machinery. As the core power transfer module in the WG 65 Series, this assembly integrates the torque converter, clutch packs, and planetary gear sets into a single sealed system. The SKU 4616.000.225 identifies a fully assembled unit ready for direct replacement, eliminating the need for piecemeal rebuilds. This assembly sits between the engine bellhousing and the final drive, managing all gear ratio changes under load. For proper mounting, ensure the 4616101111: TRANSMISSION HOUSING is inspected for cracks or wear before installation, as it provides the structural foundation for the entire unit.
Symptoms of Failure
- Delayed or harsh engagement: When the 4 WG 65 assembly wears, operators notice a significant lag between shifting and actual gear engagement, often accompanied by a jarring clunk.
- Intermittent gear slipping under load: A worn unit will lose torque during uphill climbs or heavy digging, causing the engine RPM to spike without corresponding vehicle speed.
- External oil seepage at housing joints: Degraded seals within the assembly lead to fluid weeping around the mating surfaces, particularly near the 4616301304: HOUSING and 4616301309: HOUSING sections.
- Overheating transmission fluid: Internal clutch pack slippage generates excessive heat, triggering warning lights or burnt-smelling oil.
Technical Specifications
| Parameter | Specification |
|---|---|
| Part Number | 4616.000.225 |
| Assembly Type | Complete Powershift Transmission |
| Series | WG 65 |
| Dry Weight (approx.) | 185 kg (408 lbs) |
| Overall Length | 620 mm |
| Overall Width | 480 mm |
| Overall Height | 510 mm |
| Housing Material | High-Grade Cast Iron |
| OEM Reference | ZF 4 WG 65 |
| Torque Capacity | 650 Nm (479 lb-ft) |
Compatibility
This complete unit is engineered specifically for the ZF WG 65 Series powershift transmissions. It is directly compatible with models including the WG180, WG200, and WG250 variants used in telehandlers, wheel loaders, and agricultural tractors. The assembly also fits select 4 WG 65 configurations found in older ZF drivelines. Always verify the bellhousing pattern and output flange dimensions against your existing unit. For secure fastening during installation, use the 0636011118: HEXAGON SCREW to torque the assembly to the engine block.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4616101111 | TRANSMISSION HOUSING | Main structural casing for gear and shaft support |
| 0636011118 | HEXAGON SCREW | High-tensile fastener for housing assembly |
| 4616301304 | HOUSING | Intermediate housing section for clutch pack enclosure |
| 4616301309 | HOUSING | Rear housing cover for output shaft support |
| 0636011038 | HEXAGON SCREW | Fastener for torque converter housing |
| 0636016015 | HEXAGON SCREW | Bolt for planetary carrier retention |
| 0631306085 | CYLINDRICAL PIN | Alignment dowel for housing centering |
| 0634313118 | O-RING | Hydraulic seal for clutch feed passages |
| 0636304019 | SCREW PLUG | Oil drain port closure |
| 0634801152 | SEALING RING | Copper gasket for high-pressure oil lines |
Authorized ZF Distributor
We are a certified supplier of genuine ZF components.
