ZF 4657.105.018 AXLE DISCONNECTION for WG190 | OEM Genuine Part

Overview

The ZF 4657.105.018 AXLE DISCONNECTION is a critical OEM genuine component engineered specifically for the WG 190 Series transmission. This part functions as the primary mechanism to engage or disengage the front axle drive, allowing the vehicle to switch between two-wheel drive and all-wheel drive modes without placing undue stress on the drivetrain. Located within the transfer case assembly, the axle disconnection unit directly interfaces with the 4657101078: TRANSMISSION HOUSING and the 4657201166: HOUS.FRONT SECT to ensure precise torque distribution. The SKU 4657.105.018 is manufactured to ZF’s exacting tolerances, guaranteeing a seamless fit and reliable performance in demanding industrial applications.

Symptoms of Failure

When the ZF 4657.105.018 axle disconnection unit begins to wear out, operators may notice several distinct failure indicators. First, intermittent front axle engagement occurs, where the vehicle fails to lock into all-wheel drive mode despite the system being activated, often accompanied by a grinding noise from the transfer case. Second, oil seepage around the disconnection housing is a common sign, as degraded seals allow transmission fluid to escape, leading to low lubricant levels and potential overheating. Third, vibration during straight-line driving suggests that the internal splines or shift fork have worn unevenly, causing the axle to partially engage and disengage. Finally, delayed response when toggling drive modes indicates that the actuator mechanism within the 4657.105.018 is sticking, which can escalate into complete drive failure if left unaddressed.

Technical Specifications

Compatibility

This genuine ZF axle disconnection unit is primarily designed for the WG 190 Series transmission, but it also shares mounting and functional compatibility with the WG 180, WG 200, and WG 210 series models. In these transmissions, the 4657.105.018 works in conjunction with the 4657201168: HOUSING REAR PART and the 4657298101: HOUSING REAR SECTION to form a complete rear drive assembly. Always verify your transmission model number and housing configuration before ordering to ensure a correct fit.

Related Components

Frequently Asked Questions

Q: Can the 4657.105.018 axle disconnection be repaired, or must it be replaced entirely?
A: This is a sealed OEM unit with internal splines and an actuator mechanism that cannot be serviced separately. ZF recommends full replacement with the genuine 4657.105.018 part to maintain proper engagement force and prevent premature wear of the TRANSMISSION HOUSING.

Q: How do I know if my WG 190 transmission uses this specific axle disconnection part?
A: Check the stamped identification plate on your transmission housing. If the model code includes “WG190” and the serial number falls within the 4657 range, this part is compatible. For further verification, inspect the HOUS.FRONT SECT for the corresponding mounting boss pattern.

Q: What other components should I inspect when replacing the axle disconnection unit?
A: It is strongly advised to replace the CYLINDRICAL PIN and both SCREEN SHEET filters simultaneously, as debris from a failing disconnection often contaminates these components.