Overview
The ZF 4657.105.019 AXLE DISCONNECTION is a critical OEM genuine component engineered for the WG 210 Series transmission. This part functions as the primary interface that selectively engages or disengages the front axle drive, allowing the vehicle to switch between 4×4 and 4×2 modes without placing stress on the driveline. Located within the transfer case assembly, the axle disconnection mechanism (SKU: 4657.105.019) ensures smooth torque transfer and prevents unnecessary wear on the front differential during highway operation. When paired with the 4657101051: TRANSMISSION HOUSING, this part forms the backbone of reliable power distribution in heavy-duty applications.
Symptoms of Failure
- Intermittent front axle engagement failure — The vehicle fails to engage or disengage 4WD when commanded, often accompanied by a grinding noise from the transfer case area.
- Oil seepage around the actuator shaft — Worn seals on the axle disconnection unit allow transmission fluid to leak, leaving puddles under the chassis after extended operation.
- Vibration during straight-line driving — A damaged disconnection mechanism causes driveline imbalance, resulting in noticeable shuddering at highway speeds.
- Dashboard warning light activation — The transmission control module detects incorrect position feedback, triggering a fault code and limiting vehicle performance.
Technical Specifications
| Parameter | Value |
|---|---|
| OEM Part Number | 4657.105.019 |
| Material | Hardened alloy steel with corrosion-resistant coating |
| Weight | 1.8 kg (3.97 lbs) |
| Overall Length | 215 mm |
| Actuator Diameter | 48 mm |
| Spline Count | 27 internal splines |
| Operating Torque Range | 120–180 Nm |
| OEM Reference | ZF 4657.105.019 |
Compatibility
This axle disconnection unit is specifically designed for the ZF WG 210 Series transmission family. Based on its mechanical interface and spline configuration, it is also compatible with the following ZF models: WG180, WG200, WG211, and WG212. The part integrates directly with the 4657201151: HOUS.FRONT SECT and the 4657201103: HOUSING REAR PART to create a sealed assembly. For applications requiring additional rear housing support, the 4472239184: HOUSING REAR PART is also a direct fit.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4657101051 | TRANSMISSION HOUSING | Main structural casing for gear train |
| 4657201151 | HOUS.FRONT SECT | Front section housing for input shaft |
| 4657201103 | HOUSING REAR PART | Rear housing for output bearing support |
| 4472239184 | HOUSING REAR PART | Alternate rear housing for extended configurations |
| 0631306816 | CYLINDRICAL PIN | Alignment pin for housing mating surfaces |
| 0636100801 | CAP SCREW | Fastener for securing actuator cover |
| 4656301148 | FIXING PLATE | Retention plate for disconnection mechanism |
| 4657301032 | SCREEN SHEET | Fine mesh filter for hydraulic circuit |
| 4657301033 | SCREEN SHEET | Coarse mesh pre-filter for oil intake |
| 0636100803 | CAP SCREW | High-torque fastener for housing bolts |
Frequently Asked Questions
Q: Can the ZF 4657.105.019 be repaired, or must it be replaced entirely?
A: This axle disconnection unit is a sealed OEM assembly. While external seals can be replaced, internal wear on the splines or actuator piston typically requires full replacement to ensure reliable operation.
Q: What is the typical service interval for this part in a WG210 transmission?
A: Under normal operating conditions, the axle disconnection mechanism should be inspected every 150,000 miles or 3,000 operating hours. Signs of oil contamination or delayed engagement warrant immediate replacement.
Q: Does this part require special tools for installation?
A: Yes, a spline alignment tool and a torque wrench calibrated to 85 Nm are necessary to prevent damage to the actuator fork and housing threads. Always consult the ZF service manual for your specific transmission model.
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Email: info@partszf.com |
Phone: +86 158 2286 3467 |
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