Overview
The ZF 4644.301.333 HOUSING is a critical structural component engineered for the WG 180 and WG 200 transmission series. This OEM genuine part encloses the planetary gear sets and valve body, providing precise alignment and protection against contaminants. As the primary shell of the transmission assembly, the housing (SKU: 4644.301.333) ensures that internal hydraulic pressure is maintained and that rotating elements remain securely positioned during high-torque operations. This part is machined from high-grade cast iron to withstand extreme thermal cycling and mechanical stress.
Symptoms of Failure
When the ZF 4644.301.333 HOUSING begins to degrade, operators may notice several distinct warning signs. Oil seepage around the bell housing seam is a common early indicator, often appearing as a thin film of ATF on the exterior. Gear engagement hesitation or delayed shifting can occur if internal cracks allow pressure loss within the hydraulic circuits. Vibration during acceleration typically points to misalignment caused by a warped housing face. In severe cases, visible cracks near mounting bosses will lead to complete fluid loss and transmission failure.
Technical Specifications
| Parameter | Specification |
|---|---|
| Part Number | 4644.301.333 |
| Material | GJL-250 Gray Cast Iron |
| Weight | 14.2 kg (31.3 lbs) |
| Overall Length | 485 mm |
| Mounting Bolt Pattern | 6x M12 on 180 mm PCD |
| OEM Reference | ZF 4644.301.333 |
| Surface Treatment | Phosphate coating |
Compatibility
This housing is specifically designed for the ZF WG 180 and WG 200 series powershift transmissions. It is a direct replacement for units manufactured between 2005 and 2023. The part also fits select variants of the WG 180C and WG 200E models used in construction and agricultural machinery. Always verify the casting code on your original housing before installation.
Related Components
During replacement of the 4644.301.333 HOUSING, it is recommended to inspect and replace associated sealing and fastening components. The 4644101080: TRANSMISSION HOUSING serves as the main body, while the 0730365125: TYPE PLATE provides identification data. Secure the assembly using the 0631311009: GROOVED STUD and seal fluid passages with the 0636305019: SCREW PLUG.
| Part Number | Name | Function |
|---|---|---|
| 4644101080 | TRANSMISSION HOUSING | Main structural body for gear assembly |
| 0730365125 | TYPE PLATE | Identification and serial number tag |
| 0631311009 | GROOVED STUD | Alignment and fastening dowel |
| 0636305019 | SCREW PLUG | Seals hydraulic test ports |
| 4644301247 | THREADED BUSH | Reinforced insert for bolt holes |
| 0634303485 | O-RING | Hydraulic seal between housing sections |
| 4644106055 | SHIFT SYSTEM | Controls clutch engagement sequence |
| 4642306050 | COVER PLATE | Access panel for valve body inspection |
| 4644306464 | GASKET | Paper gasket for cover plate seal |
| 4644306466 | GASKET | Rubber-coated metal gasket for oil pan |
Authorized ZF Distributor
We are a certified supplier of genuine ZF components.
