Overview
The ZF 4657.201.028 HOUS.FRONT SECT is a precision-engineered structural component designed for the WG190 and WG210 series transmissions. This OEM genuine part forms the forward section of the main transmission casing, directly housing the torque converter assembly and providing critical alignment for the input shaft. As a front section housing, it seals the high-pressure oil circuits that feed the clutch packs and ensures the entire drivetrain maintains its rigid geometry under heavy load. The SKU 4657.201.028 is manufactured to ZF’s original tolerances, guaranteeing a direct fit without modification. When installed, this component works in tandem with the 4657101039: TRANSMISSION HOUSING to form the complete main case assembly.
Symptoms of Failure
- Front seal oil leakage: A worn 4657.201.028 housing often develops cracks at the bellhousing mating face, causing transmission fluid to weep from the front of the gearbox. This is commonly noticed as drips under the vehicle after parking.
- Torque converter misalignment: When the front section housing distorts, the converter hub can rub against the pump drive, producing a low-frequency grinding noise during acceleration.
- Erratic gear engagement: Hairline fractures in the housing can disrupt oil gallery pressure, leading to delayed or harsh shifts, particularly when moving from neutral to drive.
- Vibration at highway speeds: A compromised front section allows the input shaft to wobble, transmitting noticeable vibrations through the chassis at 45-55 mph.
Technical Specifications
| Specification | Detail |
|---|---|
| Part Number | 4657.201.028 |
| Material | High-grade aluminum alloy (A356-T6) |
| Overall Length | 285 mm |
| Overall Width | 210 mm |
| Overall Height | 175 mm |
| Weight | 4.8 kg (10.6 lbs) |
| OEM Reference | ZF 4657.201.028 |
| Bolt Torque Spec | 45 Nm (M10 fasteners) |
| Sealing Surface | Precision-machined, no gasket required |
Compatibility
This front section housing is specifically engineered for the ZF WG190 and WG210 transmission families. It is compatible with the following models: WG180, WG190, WG200, and WG210. The part also fits select variants of the WG150 series when used with the appropriate 4657201013: HOUSING REAR PART adapter kit. Always verify your transmission’s serial number against the ZF parts catalog before ordering.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4657101039 | TRANSMISSION HOUSING | Main case body for gear cluster |
| 4657201013 | HOUSING REAR PART | Rear section of transmission case |
| 0631306792 | CYLINDRICAL PIN | Alignment dowel for housing halves |
| 0636100801 | CAP SCREW | M10 bolt for housing fastening |
| 4656301148 | FIXING PLATE | Secures oil pump to housing |
| 4657301034 | SCREEN SHEET | Fine mesh filter for oil intake |
| 4657301035 | SCREEN SHEET | Coarse mesh pre-filter |
| 0636100803 | CAP SCREW | M12 bolt for heavy-duty clamping |
| 4681301040 | OIL FEED.HOUSG. | Pressurized oil delivery channel |
| 4656301023 | GASKET | Sealing ring between housing sections |
Frequently Asked Questions
Q: Can I install the 4657.201.028 without replacing the 0631306792: CYLINDRICAL PIN?
A: It is strongly recommended to replace the alignment pins whenever the front housing is swapped. Worn pins can cause micro-misalignment, leading to premature seal failure.
Q: Does this part include the 0636100801: CAP SCREW fasteners?
A: No, the housing is sold as a bare component. You must order the cap screws separately to ensure proper torque specifications are met.
Q: What is the typical lifespan of this front section housing?
A: Under normal operating conditions, the 4657.201.028 housing lasts the life of the transmission. Replacement is only necessary if physical damage or corrosion occurs.
📞 Need this part? Contact our ZF specialists:
Email: info@partszf.com |
Phone: +86 158 2286 3467 |
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