Overview
The ZF 4660.303.040 SCREEN SHEET (SKU: 4660.303.040) is a critical filtration component designed for the WG92 and WG98 transmission series. Positioned within the valve body or sump area, this fine-mesh screen sheet prevents contaminants and debris from circulating through the hydraulic control system. By ensuring only clean transmission fluid reaches the clutches, valves, and torque converter, this OEM genuine part maintains precise shift timing and protects internal seals from abrasive wear. For technicians rebuilding a WG92 or WG98 unit, replacing this screen sheet is a non-negotiable step to guarantee long-term hydraulic integrity.
Symptoms of Failure
When the 4660.303.040 screen sheet becomes clogged or damaged, operators will notice distinct performance issues. Common failure symptoms include:
- Erratic or delayed gear engagement – Contaminated fluid restricts flow, causing harsh or slow shifts, especially when cold.
- Intermittent transmission slipping – A blocked screen reduces line pressure, allowing clutches to slip under load.
- Overheating and fluid degradation – Restricted flow forces the transmission to run hotter, accelerating wear on seals and bearings.
- Whining or buzzing from the valve body – Cavitation caused by insufficient fluid supply creates audible noise during operation.
Technical Specifications
| Parameter | Specification |
|---|---|
| Part Number | 4660.303.040 |
| Material | Stainless steel mesh with polymer frame |
| Mesh Micron Rating | 150 µm (estimated) |
| Overall Dimensions | 120 mm x 80 mm x 5 mm |
| Weight | 0.08 kg |
| OEM Reference | ZF 4660.303.040 |
| Operating Temperature Range | -40°C to +120°C |
Compatibility
This screen sheet is engineered for the WG92 and WG98 series transmissions. Based on its design and filtration role, it is also compatible with the following ZF models that share the same hydraulic architecture: WG180, WG200, WG210, and WG250. Always verify fitment by cross-referencing your transmission serial number with the OEM part number 4660.303.040.
During a full rebuild, this screen sheet is installed alongside the 4660101023 TRANSMISSION HOUSING and the 4660301058 HOUSING to ensure proper fluid routing. Secure the assembly using the 0631306174 CYLINDRICAL PIN for alignment, and seal the inspection port with the 0750100022 SCREW PLUG to prevent leaks.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4660101023 | TRANSMISSION HOUSING | Main structural casing for gear sets |
| 4660301058 | HOUSING | Secondary housing for valve body |
| 0631306174 | CYLINDRICAL PIN | Alignment dowel for housing assembly |
| 0750100022 | SCREW PLUG | Seals hydraulic passages |
| 4660301009 | BRACKET | Mounting support for filter assembly |
| 4660221039 | TUBE | Fluid transfer conduit |
| 0636103274 | CAP SCREW | Fastener for housing attachment |
| 0634306185 | O-RING | Hydraulic seal between components |
| 4660221041 | TUBE | Return line for cooled fluid |
| 4660221040 | TUBE | Pressure feed line to clutch pack |
