ZF 4657.105.017 AXLE DISCONNECTION for WG210 | OEM Genuine Part

Overview

The ZF 4657.105.017 AXLE DISCONNECTION is a critical hydraulic control component engineered specifically for the WG 210 Series powershift transmission. This OEM genuine part manages the engagement and disengagement of the front axle drive, allowing operators to switch between two-wheel and all-wheel drive modes under load without driveline shock. Installed within the valve body assembly, the axle disconnection unit directs pilot pressure to the clutch pack, ensuring seamless torque transfer. The SKU 4657.105.017 is precision-machined to ZF’s exacting tolerances, making it a direct replacement for worn units in heavy-duty construction and agricultural machinery. For complete transmission integrity, this component works in concert with the 4657101082: TRANSMISSION HOUSING, which provides the structural foundation for the entire gear train.

Symptoms of Failure

• Intermittent front axle engagement failure – The vehicle fails to engage all-wheel drive when selected, or engages with a noticeable delay, often accompanied by a grinding noise from the transfer case.
• Hydraulic oil leakage at the valve body – Worn seals within the 4657.105.017 unit allow transmission fluid to weep past the spool, leaving puddles under the bell housing and causing low system pressure.
• Unintended axle disconnection while driving – The driveline suddenly drops out of four-wheel drive under load, particularly during uphill climbs or when turning on loose surfaces, creating a safety hazard.
• Erratic shift quality in WG210 transmissions – Harsh or delayed shifts occur because the axle disconnection valve fails to modulate pressure correctly, leading to clutch pack chatter and reduced torque capacity.

Technical Specifications

Compatibility

This axle disconnection unit is primarily designed for the ZF WG 210 Series transmission, but it also fits select models in the WG180, WG200, and WG211 families due to shared valve body architecture. It is commonly used in ZF Ecomat and Ecolife off-highway variants found in loaders, graders, and dump trucks. Always verify the housing configuration before installation; the 4657201166: HOUS.FRONT SECT and 4657201170: HOUSING REAR PART must be inspected for wear, as they directly interface with the valve bore. For complete rear-end sealing, the 4657298102: HOUSING REAR SECTION should be replaced simultaneously to prevent cross-threading and fluid bypass.

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