Overview
The ZF 4646.101.488 TRANSMISSION HOUSING is a precision-engineered OEM sub-assembly designed for the WG 250, WG 260, and WG 310 series transmissions. This structural component encases the gear train, torque converter, and hydraulic valve body, providing the rigid backbone required for high-torque industrial applications. As a direct replacement for the original factory part, SKU 4646.101.488 ensures exact fitment and maintains the critical alignment of internal shafts and bearings. When rebuilding a WG-series unit, this housing is often paired with the 4646101189: TRANSMISSION HOUSING to complete the main casing assembly, while the 4646301317: HOUSING serves as the intermediate support structure for the clutch packs.
Symptoms of Failure
- External oil seepage at mating flanges: Cracks or warping in the housing cause transmission fluid to weep from the joint between the housing and the bell housing, often mistaken for a simple gasket failure.
- Gear engagement hesitation or slipping: Distortion of the housing bore allows the main shaft to misalign, leading to delayed clutch pack engagement and intermittent power loss under load.
- Abnormal metallic grinding noises: A fractured housing can allow gear teeth to contact the inner wall, producing a distinct scraping sound during acceleration or deceleration.
- Persistent low fluid level without visible external leaks: Internal cracks may allow oil to migrate into the torque converter cavity, bypassing the sump and causing erratic pressure readings.
Technical Specifications
| Parameter | Specification |
|---|---|
| Part Number | 4646.101.488 |
| Material | High-strength aluminum alloy (A356-T6) |
| Overall Length | 485 mm |
| Overall Width | 320 mm |
| Overall Height | 290 mm |
| Weight | 14.2 kg (31.3 lbs) |
| OEM Reference | ZF 4646.101.488 |
| Bolt Hole Pattern | 12x M12 on 280 mm PCD |
| Surface Treatment | Clear anodized |
Compatibility
This housing is engineered for the ZF WG-series powershift transmissions used in off-highway vehicles and material handling equipment. It is a direct fit for the WG 250, WG 260, and WG 310 series. Based on the mounting geometry and oil gallery layout, it also serves as a service replacement for earlier WG 180 and WG 200 models when used with the appropriate adapter kit. For secure installation, always use new 0636115293: 螺栓 and 0636101153: CAP SCREW fasteners to achieve the specified torque values.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4646101189 | TRANSMISSION HOUSING | Main casing for gear train support |
| 4646301317 | HOUSING | Intermediate clutch pack housing |
| 0636115293 | 螺栓 | M12 flange bolt for housing assembly |
| 0636101153 | CAP SCREW | M10 cap screw for cover plate |
| 0736300232 | 螺栓 | M8 hex bolt for valve block |
| 4475280208 | SCREW PLUG | Oil drain plug with magnet |
| 0634316523 | O-RING | Seal for housing-to-pump interface |
| 4656306171 | VALVE BLOCK | Hydraulic control manifold |
| 4656306190 | CONNECTING HOUSING | Adapter between engine and transmission |
| 0501213997 | PRESSURE REGULATOR | Main pressure relief valve assembly |
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