Overview
The ZF 4646.101.190 TRANSMISSION HOUSING is a precision-engineered OEM sub-assembly designed for the WG 250, WG 260, and WG 310 series of heavy-duty transmissions. This structural component encloses the gear train, clutch packs, and valve body, providing the rigid foundation required for torque transfer and hydraulic pressure containment. As a direct replacement for the original factory part, SKU 4646.101.190 ensures correct alignment of internal shafts and bearings, preventing premature wear. When installing this housing, it is critical to secure it with the correct 0636115293: 螺栓 and 0736300232: 螺栓 to maintain clamping force. Additionally, the 4475280208: SCREW PLUG seals the hydraulic test ports, while the 0634316523: O-RING prevents fluid migration between mating surfaces.
Symptoms of Failure
- External oil seepage at bell housing joint: Cracks or porosity in the housing casting allow transmission fluid to escape, often visible as drips near the engine-transmission interface.
- Gear engagement hesitation or slipping: Warpage or bolt-hole elongation shifts the valve block alignment, causing delayed clutch pack actuation under load.
- Abnormal whining or grinding noise: Bearing bore wear in the housing permits shaft misalignment, generating metallic sounds during acceleration or deceleration.
- Contaminated fluid from housing debris: Internal corrosion or fretting of the housing releases aluminum particles into the oil, clogging filters and reducing hydraulic efficiency.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number | 4646.101.190 |
| Material | High-strength aluminum alloy (A356-T6) |
| Dry Weight | 18.7 kg (41.2 lbs) |
| Overall Length | 485 mm |
| Overall Width | 320 mm |
| Overall Height | 275 mm |
| Bolt Hole Pattern | 12 x M12 on 400 mm PCD |
| OEM Reference | ZF 4646.101.190 |
| Sealing Surface Finish | Ra 0.8 µm |
Compatibility
This housing is engineered for the ZF WG series of powershift transmissions. It directly fits the WG 250, WG 260, and WG 310 models. Based on the structural design and bell housing pattern, it may also be retrofitted to earlier WG 180 and WG 200 variants with minor adapter modifications. Always verify the transmission serial number against the housing casting code before installation. For hydraulic circuit integration, the 4656306171: VALVE BLOCK mounts directly to the housing face, and the 4656306190: CONNECTING HOUSING bridges the main case to the torque converter.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 0636115293 | 螺栓 | Secures housing to transmission case |
| 0736300232 | 螺栓 | Fastens bell housing adapter ring |
| 4475280208 | SCREW PLUG | Seals hydraulic test ports |
| 0634316523 | O-RING | Prevents oil leaks at mating joints |
| 4656306171 | VALVE BLOCK | Distributes hydraulic pressure to clutches |
| 4656306190 | CONNECTING HOUSING | Links main case to torque converter |
| 0501213997 | PRESSURE REGULATOR | Controls main line pressure |
| 0736300094 | TORX SCREW | Mounts valve block to housing |
| 4475280047 | SCREW-IN SLEEVE | Provides threaded insert for sensor ports |
| 0634306010 | O形圈 | Seals screw-in sleeve interfaces |
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