Overview
The ZF 4644.303.575 SCREEN SHEET is a critical filtration component engineered specifically for the WG 200 Series transmission. This OEM genuine part sits within the transmission’s hydraulic circuit, positioned between the valve body and the oil sump, where it captures metallic debris, clutch wear particles, and other contaminants before they can circulate through the system. By maintaining fluid cleanliness, the 4644.303.575 ensures consistent hydraulic pressure and protects precision-machined components such as the 4644101178 TRANSMISSION HOUSING and the 4644301223 TRANSMISSION HOUSING from abrasive damage. This screen sheet is a direct replacement for the original factory-installed part, guaranteeing proper fitment and filtration efficiency.
Symptoms of Failure
- Delayed or harsh gear engagement: A clogged screen sheet restricts oil flow, causing sluggish shifts or abrupt engagement when the transmission struggles to build adequate pressure.
- Intermittent transmission overheating: Contaminated fluid bypassing a torn screen sheet reduces cooling efficiency, leading to elevated operating temperatures during heavy loads or extended operation.
- Erratic shift quality under load: When debris bypasses a failed screen, it can obstruct valve body passages, resulting in unpredictable shift timing or slipping during acceleration.
- Visible metallic particles in the oil pan: During routine maintenance, finding excessive metal shavings or sludge indicates the screen sheet is no longer capturing wear debris effectively.
Technical Specifications
| Part Number | 4644.303.575 |
| OEM Reference | ZF 4644.303.575 |
| Material | Stainless steel mesh with reinforced polymer frame |
| Dimensions (L x W x H) | 180 mm x 120 mm x 8 mm |
| Mesh Micron Rating | 150 microns (nominal) |
| Weight | 0.35 kg (0.77 lbs) |
| Operating Temperature Range | -40°C to +120°C (-40°F to +248°F) |
| Compatible Fluid Type | ZF approved ATF or hydraulic oil |
Compatibility
This screen sheet is primarily designed for the ZF WG 200 Series transmissions, including models such as WG180, WG200, and WG210. It also fits select variants of the WG 150 and WG 250 series where the same filtration architecture is used. Always verify the part number against your transmission’s serial plate; the 0730365067 TYPE PLATE provides the exact model designation. For secure mounting, the 0631311009 GROOVED STUD is often used in conjunction with this screen sheet during reassembly.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4644101178 | TRANSMISSION HOUSING | Main structural casing for the gear train |
| 4644301223 | TRANSMISSION HOUSING | Secondary housing for valve body assembly |
| 0730365067 | TYPE PLATE | Identification plate with model and serial number |
| 0631311009 | GROOVED STUD | Fastener for screen sheet retention |
| 4644303060 | COVER PLATE | Seals the screen sheet compartment |
| 4644303061 | COVER PLATE | Alternate cover plate variant |
| 0634306525 | O-RING | Seals cover plate to prevent leaks |
| 0636305026 | SCREW PLUG | Closes oil passages during service |
| 0501316470 | BREATHER | Equalizes internal pressure |
| 4644301279 | SCREEN SHEET | Alternate screen sheet for earlier builds |
