Overview
The ZF 4616.301.123 COVER is a critical sealing and protective component designed exclusively for the WG 65 series transmission. This OEM genuine part sits at the rear or intermediate housing interface, safeguarding internal assemblies from contamination while maintaining hydraulic pressure integrity. The SKU 4616.301.123 ensures a direct factory-fit replacement, eliminating the need for modifications. When paired with the 4616105413: OUTPUT and the 4616101117: TRANSMISSION HOUSING, this cover forms a sealed chamber that supports the output shaft and flange assembly.
Symptoms of Failure
- Oil leaks at the rear cover seal – Worn or cracked covers allow transmission fluid to escape, often visible as drips under the bell housing or output area.
- Gear slipping or delayed engagement – A compromised cover reduces hydraulic pressure, leading to erratic shifting or clutch pack slippage under load.
- Contamination ingress – Cracks or warping permit dirt and moisture to enter, accelerating wear on the 4616203017: OUTPUT FLANGE and internal bearings.
- Abnormal vibration or noise – Loose or misaligned covers cause the output assembly to shift, generating metallic sounds during operation.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number | 4616.301.123 |
| Material | Die-cast aluminum alloy (A380) |
| Weight | 1.2 kg (2.65 lbs) |
| Dimensions (L x W x H) | 210 mm x 180 mm x 45 mm |
| OEM Reference | ZF 4616.301.123 |
| Seal Type | Integrated O-ring groove (O-ring: 0634313118: O-RING) |
| Fastener Spec | Uses 0636011038: HEXAGON SCREW (M10 x 25 mm) |
Compatibility
This cover is engineered for the ZF WG 65 series, which includes models such as WG180, WG200, and WG250. It also fits select variants of the WG 60 and WG 70 families where the output housing interface matches. Always verify the 0636016015: HEXAGON SCREW and 0631306085: CYLINDRICAL PIN alignment during installation. For complete assembly, the 0732611049: FILTER INSERT and 0634303718: O-RING are often replaced concurrently.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4616105413 | OUTPUT | Transfers torque from transmission to driveshaft |
| 4616203017 | OUTPUT FLANGE | Connects output shaft to universal joint |
| 4616101117 | TRANSMISSION HOUSING | Main structural casing for gear sets |
| 0636011038 | HEXAGON SCREW | Secures cover to housing |
| 0636016015 | HEXAGON SCREW | Alternate fastener for flange mounting |
| 0631306085 | CYLINDRICAL PIN | Alignment dowel for cover positioning |
| 0634313118 | O-RING | Primary seal between cover and housing |
| 0732611049 | FILTER INSERT | Hydraulic fluid filtration element |
| 0634303718 | O-RING | Secondary seal for output flange |
| 0636610082 | STUD | Threaded rod for cover attachment |
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