Overview
The ZF 4644.306.396 COVER is a critical housing component designed specifically for the WG 180 and WG 200 transmission series. This OEM genuine part seals the differential assembly, protecting internal gears and bearings from contamination while maintaining proper oil pressure. As a structural interface, the cover mounts directly to the transmission housing and provides a precise mounting surface for the 5838109007: DIFFERENTIAL assembly. The SKU 4644.306.396 ensures exact fitment and material compatibility with ZF’s original engineering tolerances, preventing misalignment that could lead to premature wear of adjacent components.
Symptoms of Failure
- Transmission fluid seepage around the cover gasket: A worn or cracked 4644.306.396 COVER often results in visible oil leaks at the rear of the transmission, particularly after thermal cycling.
- Abnormal whining or grinding noises from the differential area: When the cover loses structural integrity, the 0750117075: TAPER ROLLER BEARING may shift, causing metal-on-metal contact.
- Intermittent gear slipping under load: A compromised cover can allow the 2095209019: DIFFERENTIAL to move out of alignment, leading to inconsistent power delivery.
- Contaminated transmission fluid: Cracks in the cover permit debris ingress, accelerating wear on internal components like the 0631329086: SPRING PIN.
Technical Specifications
| Parameter | Specification |
|---|---|
| Part Number | 4644.306.396 |
| Material | High-grade cast aluminum alloy |
| Weight | 1.8 kg (estimated) |
| Outer Diameter | 220 mm |
| Bolt Hole Pattern | 6x M10 on 180 mm PCD |
| OEM Reference | ZF 4644.306.396 |
| Surface Treatment | Corrosion-resistant anodized finish |
Compatibility
This cover is engineered for the ZF WG 180 and WG 200 series transmissions, commonly found in medium-duty trucks, construction equipment, and agricultural machinery. It directly interfaces with the differential housing and is compatible with all sub-variants of the WG 180 and WG 200 families. When replacing the cover, technicians should also inspect the 5838300817: THRUST WASHER and 5838300682: DIFFERENTIAL AXLE for wear, as these components share the same load path.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 5838109007 | DIFFERENTIAL | Distributes torque between drive wheels |
| 0750117075 | TAPER ROLLER BEARING | Supports differential shaft rotation |
| 2095209019 | DIFFERENTIAL | Alternate differential assembly variant |
| 0631329086 | SPRING PIN | Secures cover alignment during assembly |
| 5838300817 | THRUST WASHER | Reduces axial friction in differential |
| 5838300682 | DIFFERENTIAL AXLE | Transfers rotational force to wheels |
| 5838300811 | THRUST WASHER | Secondary axial load bearing surface |
| 5841302064 | THRUST WASHER | High-load thrust management |
| 5838300137 | OUTER CLUTCH DISK | Engages clutch pack for gear shifts |
| 5838300138 | INNER CLUTCH DISK | Pairs with outer disk for torque transfer |
