Overview
The ZF 4660.303.021 SCREEN SHEET is a critical filtration component engineered for the WG 90, WG 92, WG 94, and WG 98 series transmissions. Positioned within the oil sump or valve body circuit, this OEM genuine part captures metallic debris and clutch wear particles before they circulate through the hydraulic system. The SKU 4660.303.021 ensures precise mesh density to maintain consistent oil flow, directly protecting downstream components such as the TRANSMISSION HOUSING and the HOUSING II from abrasive contamination. Without this screen sheet, even minor particulate buildup can degrade shift quality and reduce transmission service life.
Symptoms of Failure
- Erratic shifting or gear hunting under load – A clogged screen sheet restricts oil flow, causing the transmission to struggle finding the correct gear ratio, especially during uphill pulls or heavy towing.
- Low hydraulic pressure warnings – Debris trapped in the 4660.303.021 screen reduces pump efficiency, triggering dashboard pressure alerts or diagnostic trouble codes.
- Visible metal flakes in the transmission fluid – When the screen sheet tears or becomes saturated, metallic particles bypass filtration and appear as glitter or sludge on the dipstick or drain plug.
- Delayed engagement from Park to Drive or Reverse – A blocked screen prevents rapid pressure buildup, leading to a noticeable lag of 2–3 seconds when selecting a gear.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number | 4660.303.021 |
| Material | Stainless steel mesh with reinforced polymer frame |
| Mesh Micron Rating | 150 µm (estimated) |
| Overall Dimensions | 120 mm x 80 mm x 5 mm |
| Weight | 0.12 kg |
| OEM Reference | ZF 4660.303.021 |
| Operating Temperature Range | -40°C to +120°C |
Compatibility
This screen sheet is designed for ZF WG-series powershift transmissions, specifically the WG180, WG200, WG210, and WG250 models. It is a direct fit for the WG 90, WG 92, WG 94, and WG 98 series. The part mounts inside the oil pan or valve body cover, secured by a CYLINDRICAL PIN and retained by the TYPE PLATE for proper alignment. Always verify your transmission serial number against the WG series designation before ordering.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4660101020 | TRANSMISSION HOUSING | Main structural casing for gear and clutch assembly |
| 4660301056 | HOUSING II | Secondary housing for valve body and oil passages |
| 0631306174 | CYLINDRICAL PIN | Alignment dowel for screen sheet and housing |
| 0769123894 | TYPE PLATE | Identification tag with transmission model and serial |
| 0750100022 | SCREW PLUG | Seals oil drain or test port openings |
| 4660221031 | SUCTION TUBE | Draws oil from pan to pump inlet |
| 0634100317 | O-RING | Seals suction tube connection |
| 0636103273 | CAP SCREW | Fastens housing and screen assembly |
| 0634306311 | O-RING | Seals cap screw and housing interface |
| 4660321029 | FIXING PLATE | Retains screen sheet in position |
