Overview
The ZF 4651.006.006 6 WG 100(500) Powershift Transmission Assembly is a complete, factory-matched unit designed for heavy-duty off-highway applications. This assembly integrates the main gear train, clutch packs, and hydraulic control system into a single, ready-to-install package. As the core of the WG 100 series, it manages torque distribution across six forward speeds, ensuring smooth power delivery under extreme loads. The SKU 4651.006.006 identifies this specific complete assembly, which is critical for restoring full drivetrain performance in ZF powershift transmissions.
Symptoms of Failure
- Delayed or harsh gear engagement: When the assembly wears, hydraulic pressure drops, causing a noticeable lag or jarring shift between forward and reverse gears.
- Transmission overheating under load: Internal wear within the 4651.006.006 unit reduces oil flow, leading to elevated operating temperatures during grading or loading cycles.
- Intermittent power loss in higher gears: Worn clutch discs or seals cause slippage in 4th, 5th, or 6th gear, resulting in a loss of tractive effort on inclines.
- External oil seepage at housing joints: Degraded seals allow transmission fluid to escape, often pooling near the bell housing or output flange.
Technical Specifications
| Parameter | Value |
|---|---|
| Assembly Weight | 185 kg (408 lbs) |
| Overall Length | 620 mm |
| Housing Material | High-strength cast iron (GGG-40) |
| Max Input Torque | 1,000 Nm (738 lb-ft) |
| OEM Reference | ZF 4651.006.006 |
| Fluid Capacity | 12.5 liters (3.3 gallons) |
Compatibility
This complete assembly is engineered for the ZF WG 100 series, specifically the 6 WG 100(500) variant. It is also compatible with the WG 180 and WG 200 series when used with the appropriate TRANSMISSION HOUSING (4651101004) and HOUSING (4651301014). For proper sealing during installation, always replace the O-RING (0634303928) and inspect the TRANSMISSION HOUSING (4651301008) for cracks. This unit fits ZF models used in loaders, graders, and industrial tractors from 2010 onward.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4651101004 | TRANSMISSION HOUSING | Encloses the gear train and supports bearing alignment |
| 4651301014 | HOUSING | Rear section housing the output shaft assembly |
| 0634303928 | O-RING | Seals the housing joint to prevent fluid leaks |
| 4651301008 | TRANSMISSION HOUSING | Intermediate housing for clutch pack support |
| 4651203002 | SCREEN SHEET | Filters debris from hydraulic oil flow |
| 4651303005 | SCREEN SHEET | Secondary filtration for the lube circuit |
| 0636101032 | CAP SCREW | Fastens housing sections with precise torque |
| 0630361028 | SEALING CAP | Closes unused hydraulic ports |
| 0636304032 | SCREW PLUG | Seals drain and fill openings |
| 0634303312 | O-RING | Provides sealing for the screw plug |
