Overview
The ZF 4651.301.014 HOUSING is a critical structural component designed for the WG 100 and WG 110 transmission series. This OEM genuine part serves as the primary enclosure for the hydraulic control unit and valve body assembly, ensuring precise alignment of internal components under high-pressure operating conditions. The SKU 4651.301.014 interfaces directly with the main 4651101004: TRANSMISSION HOUSING to create a sealed environment that directs oil flow to clutches and planetary gearsets. Without this housing, the transmission cannot maintain the hydraulic circuit integrity required for smooth power delivery in heavy-duty industrial applications.
Symptoms of Failure
- External oil seepage at the valve body interface: When the housing distorts or develops micro-fractures, pressurized ATF escapes past the 0634303928: O-RING, leaving visible drips under the transmission bell housing.
- Erratic shift timing or gear hunting: A warped housing face disrupts the sealing plane, causing cross-leakage between hydraulic circuits that delays clutch engagement during upshifts.
- Contaminated oil with metallic debris: Internal cracking of the housing allows wear particles from the 4651203002: SCREEN SHEET to bypass filtration, accelerating damage to solenoids and spool valves.
- Persistent low line pressure codes: Cracks in the housing’s pressure galleries prevent the torque converter from building adequate hydraulic force, triggering diagnostic trouble codes on electronic control units.
Technical Specifications
| Parameter | Value |
|---|---|
| OEM Part Number | 4651.301.014 |
| Material | Die-cast aluminum alloy (EN AC-46000) |
| Overall Dimensions | 380 mm x 210 mm x 95 mm |
| Dry Weight | 4.2 kg (9.26 lbs) |
| Bolt Torque Specification | 25 Nm + 90° (M8 fasteners) |
| Surface Finish | Anodized with PTFE impregnation |
| Operating Temperature Range | -40°C to +150°C |
| OEM Reference | ZF 4651.301.014 (Genuine) |
Compatibility
This housing is engineered specifically for the ZF WG 100 and WG 110 series transmissions used in municipal trucks, airport ground support equipment, and medium-duty construction vehicles. While the WG 100 series remains the primary application, the 4651.301.014 also fits select WG 180 and WG 200 variants produced after 2012 when paired with the correct 4651301008: TRANSMISSION HOUSING adapter kit. Always verify casting numbers against your existing unit before installation, as WG 120 and WG 150 models require a different bolt pattern configuration.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4651101004 | TRANSMISSION HOUSING | Main structural casing for gear train |
| 0634303928 | O-RING | Seals housing-to-valve body interface |
| 4651301008 | TRANSMISSION HOUSING | Adapter housing for WG 180/200 |
| 4651203002 | SCREEN SHEET | Fine mesh filter for hydraulic fluid |
| 4651303005 | SCREEN SHEET | Secondary filtration element |
| 0636101032 | CAP SCREW | M8 x 30 mm flange bolt |
| 0630361028 | SEALING CAP | Plugs unused hydraulic ports |
| 0636304032 | SCREW PLUG | M18 x 1.5 drain plug |
| 0634303312 | O-RING | Seals screw plug to housing |
| 4645301027 | BRACKET | Mounting support for wiring harness |
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