Overview
The ZF 4627.328.019 Gasket for the WG65 series is a precision-engineered sealing component designed to prevent fluid migration between mating surfaces within the transmission assembly. This OEM genuine part sits specifically between the main housing and the converter housing, forming a critical barrier against oil loss and contamination ingress. The SKU 4627.328.019 is manufactured to ZF’s exacting tolerances, ensuring a leak-proof interface that maintains hydraulic pressure integrity. When installed alongside the 4616101116: TRANSMISSION HOUSING, this gasket provides the necessary compression to seal the joint, while the 0636011118: HEXAGON SCREW secures the assembly with consistent clamping force.
Symptoms of Failure
- External oil seepage at housing joint: A worn or degraded 4627.328.019 gasket allows transmission fluid to escape, leaving visible drips or wet spots beneath the vehicle, especially after prolonged operation.
- Low hydraulic pressure and gear hunting: When the gasket fails, internal fluid bypass occurs, leading to erratic shift patterns, delayed engagement, or the transmission slipping out of gear under load.
- Contaminated fluid from external debris ingress: A compromised seal permits dirt and moisture to enter the transmission, causing accelerated wear on internal components like the 4616301307: HOUSING and 4616301309: HOUSING.
- Overheating due to fluid loss: Insufficient lubrication from a leaking gasket can raise operating temperatures, triggering warning lights or burnt fluid odor.
Technical Specifications
| Parameter | Specification |
|---|---|
| Part Number | 4627.328.019 |
| Material | Nitrile rubber (NBR) with fiber reinforcement |
| Thickness | 1.5 mm (estimated) |
| Outer Diameter | 120 mm (estimated) |
| Inner Diameter | 85 mm (estimated) |
| Weight | 0.02 kg |
| OEM Reference | ZF 4627.328.019 |
| Operating Temperature Range | -40°C to +150°C |
Compatibility
This gasket is primarily designed for the ZF WG65 series transmissions, including models such as WG65, WG80, and WG100. It is also compatible with select WG180 and WG200 variants where the housing interface dimensions match. The 4627.328.019 gasket is often replaced concurrently with the 0636011038: HEXAGON SCREW and 0636016015: HEXAGON SCREW to ensure even torque distribution. For complete sealing integrity, technicians frequently pair this gasket with the 0631306085: CYLINDRICAL PIN for alignment and the 0634313118: O-RING for auxiliary port sealing. Additionally, the 0636304019: SCREW PLUG and 0634801152: SEALING RING are recommended for complete overhaul kits.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4616101116 | TRANSMISSION HOUSING | Main structural casing for gear assembly |
| 0636011118 | HEXAGON SCREW | Fastener for housing joint clamping |
| 4616301307 | HOUSING | Converter housing section |
| 4616301309 | HOUSING | Rear housing section |
| 0636011038 | HEXAGON SCREW | Mounting bolt for housing |
| 0636016015 | HEXAGON SCREW | High-torque fastener |
| 0631306085 | CYLINDRICAL PIN | Alignment dowel for housing |
| 0634313118 | O-RING | Seal for hydraulic ports |
| 0636304019 | SCREW PLUG | Port closure plug |
| 0634801152 | SEALING RING | Static seal for threaded connections |
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