Overview
The ZF 4644.308.624 AXLE is a critical load-bearing component within the WG 200 Series transmission, designed to support the planetary gear sets and distribute torque evenly across the drivetrain. This OEM genuine part ensures precise alignment of internal rotating assemblies, reducing vibration and mechanical stress during high-load operations. The SKU 4644.308.624 is engineered to ZF’s original specifications, making it a direct replacement for worn units in heavy-duty commercial vehicles and industrial machinery. When paired with a robust 4644105424: DISCONNECTION mechanism, this axle maintains consistent power flow, while the 4644303538: OUTPUT FLANGE transfers rotational force to the driveshaft. Proper installation requires securing the assembly with a 0636021036: HEXAGON SCREW to prevent loosening under torque.
Symptoms of Failure
- Oil leaks near the axle housing: Worn seals or cracks in the 4644.308.624 axle allow transmission fluid to escape, often visible as drips beneath the vehicle during parking.
- Gear slipping under load: A fatigued axle cannot maintain proper gear mesh, causing intermittent loss of power when climbing grades or towing heavy loads.
- Abnormal whining or grinding noises: Misalignment from a damaged axle produces metallic sounds, particularly during acceleration or deceleration in the WG200 series.
- Vibration in the driveline: Excessive play in the axle assembly leads to shuddering felt through the chassis, worsening at highway speeds.
Technical Specifications
| Specification | Value |
|---|---|
| Part Number | 4644.308.624 |
| Material | Case-hardened alloy steel |
| Weight | 12.4 kg (27.3 lbs) |
| Length | 485 mm |
| Diameter | 65 mm (bearing journal) |
| OEM Reference | ZF 4644.308.624 |
| Surface Finish | Ground and polished |
Compatibility
This axle is specifically designed for the ZF WG 200 Series transmission family, including models WG180, WG200, and WG210. It is a direct fit for transmissions used in buses, construction loaders, and agricultural tractors. The 4644.308.624 axle interfaces with the 4644101224: TRANSMISSION HOUSING to create a sealed chamber for lubricant circulation. For complete rebuilds, verify compatibility with your transmission’s serial number against ZF’s parts catalog.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4644105424 | DISCONNECTION | Engages/disengages power flow to the axle |
| 4644303538 | OUTPUT FLANGE | Connects axle to driveshaft |
| 0636021036 | HEXAGON SCREW | Secures axle to housing |
| 4644101224 | TRANSMISSION HOUSING | Encloses axle and gears |
| 4644301346 | TRANSMISSION HOUSING | Alternate housing variant |
| 0730365067 | TYPE PLATE | Identifies transmission model |
| 4644106300 | SHIFT SYSTEM | Controls gear selection |
| 4644306500 | COVER PLATE | Protects internal components |
| 4644159311 | SHIFT SYSTEM | Alternate shift mechanism |
| 4644306563 | VALVE BLOCK | Regulates hydraulic pressure |
