Overview
The ZF 4644.201.011 COVER PLATE is a critical sealing and structural component engineered specifically for the WG 200 Series transmission family. This OEM genuine part, identified by SKU 4644.201.011, sits at the rear or intermediate housing interface, providing a secure barrier that contains transmission fluid under pressure while protecting internal gear sets from external contaminants. In the WG200 assembly, this cover plate works in concert with the 4644101164: TRANSMISSION HOUSING and the 4644301371: TRANSMISSION HOUSING to maintain structural rigidity. The plate also serves as a mounting point for the 0730365067: TYPE PLATE, ensuring proper identification of the transmission series.
Symptoms of Failure
When the ZF 4644.201.011 cover plate degrades, operators may notice several distinct failure indicators. Transmission fluid seepage around the housing joint is the most common symptom, often appearing as a thin oil film on the bell housing or transmission pan. Gear engagement hesitation or slipping can occur if the plate warps, reducing internal hydraulic pressure needed for clutch pack application. Unusual metallic rattling or vibration at low RPM suggests the plate has loosened or cracked, allowing the 0631311009: GROOVED STUD to shift out of alignment. Contaminated transmission fluid with visible metal particles indicates the cover plate has fractured internally, allowing gear debris to circulate through the system.
Technical Specifications
| Specification | Detail |
|---|---|
| Part Number | 4644.201.011 |
| OEM Reference | ZF 4644.201.011 |
| Material | Die-cast aluminum alloy (A380) |
| Overall Dimensions | 210 mm x 145 mm x 18 mm |
| Bolt Hole Pattern | 8 x M10 threaded bores |
| Weight | 0.85 kg (1.87 lbs) |
| Surface Finish | Black anodized with sealing gasket groove |
| Operating Temperature Range | -40°C to +120°C |
Compatibility
This cover plate is precision-machined for the ZF WG 200 Series transmissions, including models WG180, WG200, and WG210. It is also compatible with select ZF Ecomat 4HP and 5HP variants that share the same housing architecture. The 4644.201.011 replaces superseded part numbers 4644.201.010 and 4644.201.009. For proper installation, always pair this plate with a new 0634306525: O-RING and verify the 0636305026: SCREW PLUG torque specification. The plate is not interchangeable with earlier ZF 4HP22 or 5HP24 cover plates due to different bolt patterns.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4644101164 | TRANSMISSION HOUSING | Main structural casing for gear assembly |
| 4644301371 | TRANSMISSION HOUSING | Intermediate housing section |
| 0730365067 | TYPE PLATE | Identification tag for transmission model |
| 0631311009 | GROOVED STUD | Alignment and retention fastener |
| 4644303060 | COVER PLATE | Alternate cover for WG200 variants |
| 4644201010 | COVER PLATE | Front cover plate for WG200 |
| 4644301372 | COVER PLATE | Rear cover plate for WG200 |
| 0636610028 | STUD | Threaded mounting stud |
| 0634306525 | O-RING | Hydraulic seal for cover plate |
| 0636305026 | SCREW PLUG | Drain or fill port plug |
