Overview
This OEM sub-assembly, the ZF 4646.101.459 Transmission Housing, serves as the primary structural core for the WG 250, WG 260, and WG 310 series gearboxes. It encloses the planetary gear sets, valve body, and clutch packs, providing precise alignment for all rotating components. As a direct replacement for the original factory part, SKU 4646.101.459 ensures correct oil channel routing and bolt-hole tolerances. Without this housing, the transmission cannot maintain hydraulic pressure or gear engagement integrity.
Symptoms of Failure
- Oil leaks at the bell housing or main case seam: Cracks or porosity in the housing allow ATF to escape, leading to low fluid levels and eventual gear slipping.
- Persistent gear slipping or delayed engagement: Warped mounting surfaces misalign the valve body, causing erratic shift timing and clutch pack chatter.
- Excessive drivetrain vibration: A fractured housing loses its ability to dampen torsional loads, transmitting noise through the chassis during acceleration.
- Contaminated transmission fluid: Internal cracks let debris enter the oil circuit, accelerating wear on pumps and solenoids.
Technical Specifications
| Parameter | Value |
|---|---|
| OEM Part Number | 4646.101.459 |
| Material | Die-cast aluminum alloy (A380) |
| Dry Weight | 14.2 kg (31.3 lbs) |
| Overall Length | 485 mm |
| Bolt Hole Pattern | 6x M12 on 130 mm PCD |
| Sealing Surface Finish | Ra 0.8 µm |
| Max Operating Pressure | 18 bar (261 psi) |
| Compatible Fastener | 0636115293 螺栓 |
| Compatible Fastener | 0736300232 螺栓 |
| Drain Plug | 4475280208 SCREW PLUG |
| Sealing Element | 0634316523 O-RING |
Compatibility
This housing is engineered for the ZF WG 250, WG 260, and WG 310 series transmissions. It also fits select variants of the WG 180 and WG 200 models when used with the correct adapter plate. The part is listed under current categories WG 261 Series and WG 311 Series. Always verify the bell housing bolt pattern before installation.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 0636115293 | 螺栓 | Housing-to-bell housing fastener |
| 0736300232 | 螺栓 | Valve body mounting bolt |
| 4475280208 | SCREW PLUG | Oil drain port seal |
| 0634316523 | O-RING | Housing-to-pump interface seal |
| 0630361026 | SEALING CAP | Pressure test port cover |
| 0501214611 | 齿轮泵 | Hydraulic oil pump assembly |
| 0634313945 | O形圈 | Pump-to-housing seal |
| 0501322534 | TEMPERATURE SENSOR | Oil temperature monitoring |
| 0634313366 | O-RING | Sensor bore seal |
| 4646130044 | ENGINE CONNECTION | Bell housing adapter plate |
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