Overview
The ZF 4642.330.190 COVER PLATE is a critical sealing and structural component designed exclusively for the WG 150 Series transmission. This OEM genuine part, identified by SKU 4642.330.190, sits at the rear or intermediate housing interface, providing a secure barrier that contains transmission fluid and protects internal gear assemblies from contaminants. As a precision-engineered cover plate, it ensures proper alignment of the output shaft and maintains the hydraulic pressure necessary for smooth clutch engagement. When paired with the TRANSMISSION HOUSING (4642101108) or the TRANSMISSION HOUSING (4642301208), this cover plate forms a leak-proof seal that is essential for long-term transmission reliability.
Symptoms of Failure
- Transmission fluid seepage around the rear housing: A worn or warped cover plate often causes slow oil leaks that appear as dark stains under the vehicle, particularly after extended operation.
- Intermittent gear slipping under load: When the cover plate loses its sealing integrity, hydraulic pressure drops, leading to delayed or incomplete clutch pack engagement during acceleration.
- Contaminated transmission fluid: A cracked cover plate allows dirt and moisture to enter the housing, resulting in gritty or discolored oil that accelerates internal wear.
- Abnormal noise from the rear bearing area: Misalignment caused by a damaged cover plate can produce a low-frequency hum or whine, especially during deceleration.
Technical Specifications
| Specification | Detail |
|---|---|
| Part Number | 4642.330.190 |
| Material | High-grade die-cast aluminum alloy |
| Overall Dimensions | 210 mm x 180 mm x 25 mm |
| Bolt Hole Pattern | 8 x M10 on 160 mm PCD |
| Weight | 0.85 kg (1.87 lbs) |
| OEM Reference | ZF 4642.330.190 |
| Surface Finish | Anodized with gasket groove |
Compatibility
This cover plate is engineered primarily for the ZF WG 150 Series transmission, but its mounting pattern and sealing profile also make it suitable for the WG 180 and WG 200 models when used with the correct adapter kit. It directly interfaces with the TYPE PLATE (0730365125) for identification and is secured using the GROOVED STUD (0631311009) for precise torque retention. For complete assembly, verify compatibility with your specific transmission serial number.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4642101108 | TRANSMISSION HOUSING | Main structural casing for gear sets |
| 4642301208 | TRANSMISSION HOUSING | Alternate housing variant for WG series |
| 0730365125 | TYPE PLATE | Identification tag for transmission model |
| 0631311009 | GROOVED STUD | Threaded fastener for cover plate retention |
| 4642301168 | SCREEN SHEET | Fine mesh filter for hydraulic circuit |
| 4642301169 | SCREEN SHEET | Alternate mesh filter specification |
| 0636100621 | HEXAGON SCREW | Mounting bolt for housing assembly |
| 0630361029 | SEALING CAP | Port plug for pressure testing |
| 4642306254 | ADAPTER | Interface piece for non-standard housings |
| 0634303340 | O-RING | Elastomeric seal for cover plate joint |
