Overview
The ZF 4657.105.008 AXLE DISCONNECTION is a critical OEM genuine component engineered specifically for the WG190 and WG210 series transmissions. This precision-machined assembly governs the engagement and disengagement of the axle drive, allowing the transmission to seamlessly switch between two-wheel and all-wheel drive modes. Positioned within the rear housing section, the SKU 4657.105.008 interacts directly with the HOUSING REAR SECTION to ensure torque is correctly routed. When functioning properly, it provides smooth power transfer and reduces drivetrain drag, directly improving fuel efficiency in heavy-duty industrial applications.
Symptoms of Failure
- Intermittent axle engagement failure: The vehicle may hesitate or fail to engage the front axle when selected, often accompanied by a grinding noise from the HOUSING REAR PART area.
- Oil seepage at the disconnect housing: Worn seals on the 4657.105.008 allow transmission fluid to leak past the actuator, leaving visible drips under the chassis near the axle interface.
- Unexpected driveline vibration: A failing disconnect mechanism can cause the axle to partially engage at high speeds, creating a rhythmic shudder that intensifies during turns.
- Dashboard warning light activation: Modern ZF systems detect incorrect axle position feedback, triggering a transmission fault code and limiting vehicle speed.
Technical Specifications
| Parameter | Value |
|---|---|
| OEM Part Number | 4657.105.008 |
| Material | Hardened alloy steel with corrosion-resistant coating |
| Weight | 1.45 kg (3.2 lbs) |
| Overall Length | 185 mm |
| Flange Diameter | 92 mm |
| Operating Temperature Range | -40°C to +120°C |
| OEM Reference | ZF 4657.105.008 |
Compatibility
This axle disconnection unit is factory-designed for the ZF WG190 and WG210 transmission families. It also retrofits into the WG180 and WG200 series with identical mounting interfaces. The part integrates directly with the TRANSMISSION HOUSING and the HOUS.FRONT SECT to complete the driveline assembly. Always verify your transmission serial number before ordering to ensure correct fitment.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4657101082 | TRANSMISSION HOUSING | Main structural casing for gear sets |
| 4657201166 | HOUS.FRONT SECT | Front section housing the input shaft |
| 4657201170 | HOUSING REAR PART | Rear cover for output bearing support |
| 4657298102 | HOUSING REAR SECTION | Extended rear housing for axle interface |
| 0631306816 | CYLINDRICAL PIN | Alignment dowel for housing assembly |
| 0636100801 | CAP SCREW | M10 fastener for housing retention |
| 4656301148 | FIXING PLATE | Locking plate for disconnect mechanism |
| 4657301032 | SCREEN SHEET | Fine mesh filter for oil return |
| 4657301033 | SCREEN SHEET | Coarse mesh pre-filter for sump |
| 0636100803 | CAP SCREW | M12 bolt for rear housing attachment |
Frequently Asked Questions
Q: Can the 4657.105.008 be rebuilt, or must it be replaced as a unit?
A: This is a sealed OEM assembly. While internal seals can be replaced, ZF recommends full replacement to ensure precise actuator tolerances and avoid premature failure.
Q: Does this part require special tools for installation?
A: Yes. A torque wrench calibrated to 45 Nm and a splined socket for the cap screws (such as 0636100803) are necessary. Always consult the WG190 service manual for pre-load procedures.
Q: How does a failing axle disconnection affect fuel economy?
A: A stuck-engaged disconnect creates constant drag on the front differential, reducing fuel economy by up to 8% in highway driving. Replacing the 4657.105.008 restores freewheel capability.
📞 Need this part? Contact our ZF specialists:
Email: info@partszf.com |
Phone: +86 158 2286 3467 |
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