Overview
The ZF 4651.301.010 HOUSING is a precision-machined 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 proper fluid routing and pressure containment within the gearbox. As a critical interface between the main casing and the internal clutch packs, the SKU 4651.301.010 maintains exacting tolerances to prevent cross-leakage between hydraulic circuits. When installed correctly, this housing supports the 4651101005: TRANSMISSION HOUSING to form a sealed environment that withstands high operating pressures and thermal cycling.
Symptoms of Failure
- External hydraulic fluid seepage – Cracks or porosity in the housing casting often cause oil to weep from the WG 100 transmission bell housing area, particularly during cold starts or under load.
- Erratic shift timing and clutch slip – Warpage or internal scoring disrupts valve body alignment, leading to delayed engagement or unintended gear disengagement during acceleration.
- Contaminated transmission fluid with metallic debris – Fretting wear between the housing and mating surfaces generates fine aluminum particles that circulate through the system, accelerating damage to the 0634303928: O-RING seals.
- Abnormal whining or knocking noises – Distortion of the housing bore creates uneven bearing support, producing audible mechanical noise that intensifies with transmission temperature rise.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number | 4651.301.010 |
| Material | High-grade aluminum alloy (A356-T6) |
| Weight | 2.85 kg (6.28 lbs) |
| Overall Dimensions | 320 mm x 210 mm x 95 mm |
| OEM Reference | ZF 4651.301.010 |
| Bolt Torque Spec | 25 Nm ± 2 Nm |
| Surface Finish | Anodized, Ra 0.8 μm |
Compatibility
This housing is engineered specifically for the ZF WG 100 and WG 110 series transmissions used in medium-duty commercial vehicles and industrial machinery. It is also compatible with the WG 120, WG 150, and WG 180 models where the valve body mounting pattern matches. For proper assembly, technicians should pair this component with the 4651301017: HOUSING and the 4651203002: SCREEN SHEET to ensure debris filtration and correct fluid flow. Always verify casting date codes against your transmission serial number for optimal fitment.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4651101005 | TRANSMISSION HOUSING | Main structural casing for gear train |
| 0634303928 | O-RING | Seals housing-to-valve body interface |
| 4651301017 | HOUSING | Secondary cover for clutch pack access |
| 4651203002 | SCREEN SHEET | Fine mesh filter for hydraulic fluid |
| 4651303005 | SCREEN SHEET | Coarse pre-filter for sump return |
| 0636101032 | CAP SCREW | M10 fastener for housing retention |
| 0630361028 | SEALING CAP | Plugs unused hydraulic ports |
| 0636304032 | SCREW PLUG | Drain or test port closure |
| 0634303312 | O-RING | Seals screw plug to housing |
| 4645301027 | BRACKET | Mounts wiring harness to housing |
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