Overview
The ZF 4644.026.357 GETRIEBE is a critical OEM genuine gear assembly engineered specifically for the WG 200 series transmission. This component serves as the primary mechanical power transfer unit within the drivetrain, converting engine torque into controlled rotational force for heavy-duty industrial applications. Positioned centrally within the transmission housing, the GETRIEBE interfaces directly with the 4644101235: TRANSMISSION HOUSING and the 4644301310: TRANSMISSION HOUSING to ensure precise alignment and load distribution. The SKU 4644.026.357 is manufactured to ZF’s exacting tolerances, guaranteeing seamless integration and long service life in demanding environments such as construction, mining, and material handling equipment.
Symptoms of Failure
When the ZF 4644.026.357 GETRIEBE begins to wear, operators may notice several distinct failure indicators. Oil leaks around the gear housing are a common early sign, often caused by degraded seals or cracked casing under high thermal stress. Gear slipping during load shifts occurs as internal teeth wear down, reducing torque transfer efficiency. Unusual grinding or whining noises from the transmission indicate bearing fatigue or misalignment within the gear set. Delayed engagement when shifting between forward and reverse suggests the GETRIEBE is losing hydraulic pressure support, often linked to issues with the 4644106301: SHIFT SYSTEM.
Technical Specifications
| Parameter | Specification |
|---|---|
| Part Number | 4644.026.357 |
| OEM Reference | ZF GETRIEBE WG200 |
| Material | Case-hardened alloy steel |
| Weight | 14.2 kg (31.3 lbs) |
| Dimensions (L x W x H) | 320 mm x 210 mm x 180 mm |
| Gear Ratio | 1:1.45 (input to output) |
| Operating Temperature | -20°C to 120°C |
| Torque Capacity | 850 Nm max |
Compatibility
This OEM genuine part is designed for the ZF WG 200 series transmission family. It is fully compatible with WG180, WG200, and WG210 models, as well as select variants of the WG150 series when used with the appropriate 0730365067: TYPE PLATE for identification. The GETRIEBE 4644.026.357 also integrates with earlier WG 190 units, though verification of housing dimensions is recommended. For optimal performance, always pair this gear assembly with the correct shift system and valve block components from the same OEM batch.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4644101235 | TRANSMISSION HOUSING | Encloses and supports gear assembly |
| 4644301310 | TRANSMISSION HOUSING | Secondary housing for torque distribution |
| 0730365067 | TYPE PLATE | Identification and specification label |
| 4644106301 | SHIFT SYSTEM | Controls gear engagement and disengagement |
| 4644306507 | COVER PLATE | Seals and protects internal components |
| 4644159302 | SHIFT SYSTEM | Alternate shift mechanism for WG200 |
| 4644306560 | VALVE BLOCK | Regulates hydraulic fluid flow |
| 4644306408 | WASHER | Ensures proper bolt torque and sealing |
| 4644306513 | COVER | Access panel for maintenance |
| 4644306555 | COVER | Secondary protective cover |
