Overview
The ZF 4657.303.030 PLATE is a critical structural component engineered specifically for the WG190 and WG210 series transmissions. This OEM genuine part functions as a precision-machined separator and load-bearing surface within the clutch or planetary gear assembly, ensuring correct axial clearance and oil flow distribution. The SKU 4657.303.030 is manufactured to ZF’s exacting tolerances, providing a direct replacement that restores factory-specified gear engagement and hydraulic pressure integrity. When installed alongside the 4657101045: TRANSMISSION HOUSING, this plate forms a sealed boundary that prevents cross-contamination between lubrication circuits.
Symptoms of Failure
- Intermittent gear slipping under load: A warped or worn 4657.303.030 plate reduces clamping force on clutch packs, causing the transmission to slip during acceleration or hill climbs.
- Low hydraulic pressure warnings: Cracks or surface erosion on the plate allow pressurized oil to bypass the intended channels, triggering dashboard pressure alerts and delayed shifts.
- Visible oil leaks at the transmission housing seam: Degradation of the plate’s sealing face permits ATF to weep past the HOUS.FRONT SECT interface, leaving puddles under the vehicle.
- Metallic debris in the transmission pan: Spalling of the plate’s hardened surface generates fine steel particles that contaminate the fluid and accelerate wear on bearings and valves.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number | 4657.303.030 |
| Material | Case-hardened alloy steel (DIN 1.7131) |
| Outer Diameter | 210 mm |
| Inner Diameter | 145 mm |
| Thickness | 4.5 mm |
| Weight | 0.85 kg |
| OEM Reference | ZF 4657.303.030 |
| Surface Hardness | HRC 58-62 |
| Fastener Torque Spec | 45 Nm (use with 0636100801: CAP SCREW) |
Compatibility
This plate is a direct-fit component for the ZF WG190 and WG210 series transmissions. It is also compatible with the closely related WG180 and WG200 models when used in conjunction with the HOUSING REAR PART. The 4657.303.030 is not interchangeable with earlier WG160 variants due to differences in bolt pattern spacing. For proper alignment during installation, the 0631306792: CYLINDRICAL PIN must be used to index the plate to the housing.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4657101045 | TRANSMISSION HOUSING | Main structural casing that encloses all rotating assemblies |
| 4657201027 | HOUS.FRONT SECT | Forward section housing the torque converter and pump |
| 4657201020 | HOUSING REAR PART | Rear housing that supports output shaft and governor |
| 0631306792 | CYLINDRICAL PIN | Alignment dowel for precise plate-to-housing positioning |
| 0636100801 | CAP SCREW | M10 x 30mm fastener for plate retention |
| 4656301148 | FIXING PLATE | Secondary locking bracket for vibration resistance |
| 4657301032 | SCREEN SHEET | Fine mesh filter for hydraulic circuit protection |
| 4657301033 | SCREEN SHEET | Coarse mesh pre-filter for sump return line |
| 0636100803 | CAP SCREW | M8 x 20mm fastener for screen sheet mounting |
| 0750301003 | OIL FEED.HOUSG. | Pressurized oil delivery manifold to clutch packs |
Frequently Asked Questions
Q: Can the 4657.303.030 plate be reused after a transmission rebuild?
A: ZF recommends replacing this plate during any major overhaul because the hardened surface can develop micro-cracks that are invisible to the naked eye. Always install a new OEM plate along with fresh CAP SCREW fasteners.
Q: What is the difference between the 4657.303.030 and the 4656301148 FIXING PLATE?
A: The 4657.303.030 is a primary load-bearing separator plate inside the clutch stack, while the FIXING PLATE is an external bracket that prevents rotational loosening of the housing bolts.
Q: Does this plate require any special tools for installation?
A: Yes, you will need a torque wrench capable of 45 Nm and a soft-faced mallet to seat the plate evenly against the HOUS.FRONT SECT without damaging the sealing surfaces.
📞 Need this part? Contact our ZF specialists:
Email: info@partszf.com |
Phone: +86 158 2286 3467 |
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