Overview
The ZF 4657.105.409 AXLE DISCONNECTION is a critical OEM genuine component engineered specifically for the WG 210 Series transmission. This precision-machined part governs the selective engagement and disengagement of the drive axle, effectively managing torque distribution between the transmission output and the differential. When the axle disconnection unit is activated, it isolates the driveline, reducing parasitic drag and improving fuel efficiency during unloaded or coasting conditions. The SKU 4657.105.409 interfaces directly with the 4657101041: TRANSMISSION HOUSING and the 4657201028: HOUS.FRONT SECT, forming a sealed assembly that withstands high hydraulic pressures and thermal cycling. As an OEM genuine part, it guarantees exact fitment and factory-specified clearance tolerances, eliminating the risk of premature wear found in aftermarket alternatives.
Symptoms of Failure
- Delayed or incomplete axle engagement: When the 4657.105.409 wears internally, operators may experience a noticeable lag between shifting and actual axle lock-up, often accompanied by a grinding noise during low-speed maneuvers.
- Hydraulic oil seepage at the housing joint: Degraded seals within the axle disconnection unit allow transmission fluid to escape, leaving visible puddles beneath the vehicle and causing low-pressure warnings on the dashboard.
- Intermittent loss of drive to the rear axle: A failing disconnection mechanism can cause the axle to randomly disengage under load, resulting in sudden RPM spikes and a complete loss of traction on inclines.
- Increased fuel consumption without diagnostic codes: A stuck or partially engaged disconnection unit creates constant drag, forcing the engine to work harder while the transmission computer registers no fault.
Technical Specifications
| Parameter | Value |
|---|---|
| OEM Part Number | 4657.105.409 |
| Material | Hardened alloy steel with corrosion-resistant coating |
| Weight | 2.8 kg (6.17 lbs) |
| Overall Length | 195 mm |
| Mounting Bolt Pattern | 4 x M12 on 85 mm PCD |
| Hydraulic Pressure Rating | 18 bar (261 psi) max |
| Operating Temperature Range | -40°C to +120°C |
| OEM Reference | ZF 4657.105.409 |
Compatibility
This axle disconnection unit is primarily designed for the ZF WG 210 Series, but its mounting geometry and hydraulic interface also make it compatible with the WG 180, WG 200, and WG 250 transmission families. It integrates seamlessly with the 4657201013: HOUSING REAR PART to complete the rear driveline seal, and is secured using the 0631306792: CYLINDRICAL PIN for precise alignment. Always verify your transmission serial number against the ZF parts catalog to confirm fitment before installation.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4657101041 | TRANSMISSION HOUSING | Main structural casing for gear train |
| 4657201028 | HOUS.FRONT SECT | Front section housing input shaft bearings |
| 4657201013 | HOUSING REAR PART | Rear section enclosing output shaft assembly |
| 0631306792 | CYLINDRICAL PIN | Alignment dowel for housing mating surfaces |
| 0636100801 | CAP SCREW | Fastener for securing housing flanges |
| 4656301148 | FIXING PLATE | Retains axle disconnection unit in position |
| 4657301034 | SCREEN SHEET | Fine mesh filter for hydraulic circuit |
| 4657301035 | SCREEN SHEET | Coarse mesh pre-filter for oil return |
| 0636100803 | CAP SCREW | High-tensile bolt for cover plate |
| 0631311009 | GROOVED STUD | Threaded stud for sensor mounting |
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