Overview
The ZF 4644.306.476 GASKET is a critical sealing component engineered for the WG 180 and WG 200 series transmissions. This OEM genuine part sits between the transmission housing and the oil pan or cover plate, ensuring a leak-proof seal under high-pressure and high-temperature operating conditions. Designed to withstand aggressive transmission fluids and thermal cycling, the 4644.306.476 gasket prevents contamination ingress and fluid loss. For optimal assembly integrity, this gasket is often installed alongside a TRANSMISSION HOUSING (4642101109) or a TRANSMISSION HOUSING (4642301205) to maintain structural alignment.
Symptoms of Failure
- External oil seepage at the pan-to-housing interface: A worn 4644.306.476 gasket allows transmission fluid to weep past the mating surface, leaving visible drips or wet spots under the vehicle.
- Low fluid level without visible cracks: Gradual gasket degradation can cause slow fluid loss, leading to erratic shifting or delayed engagement in WG 180 and WG 200 units.
- Contaminated transmission fluid: A compromised seal permits dirt and moisture to enter the system, accelerating wear on internal components like the SHIFT SYSTEM (4644106231).
- Audible whining or gear slipping: As fluid pressure drops due to gasket failure, hydraulic pressure loss can cause clutch pack slippage and increased operating noise.
Technical Specifications
| Specification | Value |
|---|---|
| Part Number | 4644.306.476 |
| Material | Nitrile rubber (NBR) with fiber reinforcement |
| Thickness | 1.5 mm (estimated) |
| Outer Diameter | 210 mm (estimated) |
| Inner Diameter | 185 mm (estimated) |
| Weight | 0.04 kg |
| OEM Reference | ZF 4644.306.476 |
| Operating Temperature Range | -40°C to +150°C |
Compatibility
This gasket is designed for ZF WG 150, WG 180, WG 200, and WG 201 series transmissions. It is commonly used in industrial vehicles, construction equipment, and heavy-duty trucks requiring a reliable seal between the transmission housing and oil pan. When replacing this gasket, verify the condition of the TYPE PLATE (0730365125) for accurate model identification, and inspect the GROOVED STUD (0631311009) for thread integrity to ensure proper torque application.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4642101109 | TRANSMISSION HOUSING | Main structural casing for gear assembly |
| 4642301205 | TRANSMISSION HOUSING | Alternative housing for WG 200 series |
| 0730365125 | TYPE PLATE | Identification plate for transmission model |
| 0631311009 | GROOVED STUD | Fastener for housing alignment |
| 4642301168 | SCREEN SHEET | Filter mesh for fluid debris |
| 4642301169 | SCREEN SHEET | Secondary filter element |
| 0636100621 | HEXAGON SCREW | Fastener for pan attachment |
| 4642301186 | SCREEN SHEET | Fine-mesh debris screen |
| 4644106231 | SHIFT SYSTEM | Hydraulic shift control assembly |
| 4644306470 | GASKET | Seal for auxiliary ports |
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