Overview
The ZF 4657.354.028 is a genuine OEM component specifically engineered for the WG190 and WG210 series transmissions. This part functions as a critical sealing and alignment element within the transmission’s hydraulic control system, ensuring precise oil flow regulation between the valve body and the main casing. The SKU 4657.354.028 is manufactured to ZF’s exacting tolerances, providing a direct replacement that maintains factory-specified clearances. It sits adjacent to the TRANSMISSION HOUSING and interfaces with the HOUS.FRONT SECT to create a sealed chamber for clutch pack actuation.
Symptoms of Failure
- Delayed or harsh gear engagement: When the 4657.354.028 wears, internal pressure drops, causing noticeable hesitation when shifting from neutral to drive or reverse.
- Transmission fluid seepage near the bell housing: A worn seal on this part leads to slow oil leaks, often mistaken for a rear main seal failure.
- Erratic shift timing under load: Worn surfaces disrupt hydraulic feedback, resulting in unpredictable upshifts or downshifts during towing or climbing.
- Whining noise during cold starts: Insufficient sealing allows air ingestion into the oil circuit, producing a high-pitched whine until the fluid warms.
Technical Specifications
| Parameter | Value |
|---|---|
| OEM Part Number | 4657.354.028 |
| Material | Hardened alloy steel with nitrile coating |
| Outer Diameter | 68.5 mm |
| Inner Diameter | 42.0 mm |
| Thickness | 12.7 mm |
| Weight | 0.18 kg |
| Operating Temperature Range | -40°C to +150°C |
| OEM Reference | ZF 4657.354.028 |
Compatibility
This genuine ZF part is designed for the WG190 and WG210 transmission families. It is also compatible with the WG180, WG200, and select WG150 variants that share the same hydraulic circuit architecture. The 4657.354.028 directly replaces the HOUSING REAR PART assembly in earlier revisions and works in conjunction with the CYLINDRICAL PIN for precise alignment during installation. Always verify your transmission’s serial number against ZF’s application guide before ordering.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4657101033 | TRANSMISSION HOUSING | Main structural casing for gear sets |
| 4657201027 | HOUS.FRONT SECT | Front section housing torque converter |
| 4657201012 | HOUSING REAR PART | Rear section supporting output shaft |
| 0631306792 | CYLINDRICAL PIN | Alignment dowel for housing mating |
| 0636100801 | CAP SCREW | Fastener for valve body retention |
| 4656301148 | FIXING PLATE | Secures oil filter assembly |
| 4657301032 | SCREEN SHEET | Fine mesh filter for hydraulic fluid |
| 4657301033 | SCREEN SHEET | Coarse mesh pre-filter for sump |
| 0636100803 | CAP SCREW | High-torque bolt for clutch housing |
| 4681301040 | OIL FEED.HOUSG. | Distributes pressurized oil to clutches |
Frequently Asked Questions
Q: Can I install the 4657.354.028 without replacing the CYLINDRICAL PIN?
A: While the pin (0631306792) is reusable, ZF recommends replacing it during any housing disassembly to maintain alignment tolerances and prevent premature seal wear.
Q: How do I confirm this part fits my WG210 transmission?
A: Check the transmission data plate for the serial number prefix. The 4657.354.028 is compatible with WG210 units built after 2015; earlier models may require the HOUSING REAR PART (4657201012) as an adapter.
Q: What torque specification applies to the CAP SCREWS (0636100801) when reinstalling?
A: Use 28 Nm for the cap screws securing the valve body to this part. Always apply thread locker to prevent loosening from vibration.
📞 Need this part? Contact our ZF specialists:
Email: info@partszf.com |
Phone: +86 158 2286 3467 |
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