Overview
The ZF 4616.104.004 DIFFERENTIAL is a critical torque-distribution component engineered specifically for the WG 65 series transmission. This OEM genuine part, identified by SKU 4616.104.004, sits at the heart of the final drive assembly, where it splits engine power between the left and right axle shafts while allowing for speed differences during cornering. In the WG 65 gearbox, this differential works in concert with the 4616105415: OUTPUT to transfer rotational force smoothly. The unit is housed within the 4616101094: TRANSMISSION HOUSING, where it is secured using precision fasteners like the 0636011038: HEXAGON SCREW to maintain exacting tolerances under heavy loads.
Symptoms of Failure
When the ZF 4616.104.004 differential begins to wear, operators typically notice several distinct failure modes. Whining or howling noise from the axle area during turns is a primary indicator of worn differential gears or bearings. Oil seepage around the differential housing often signals degraded seals, which can lead to lubricant starvation. Vibration or shuddering during acceleration from a stop suggests excessive gear lash or damaged spider gears. Additionally, uneven tire wear patterns across the drive axle can point to a differential that is no longer distributing torque evenly. Addressing these symptoms promptly prevents cascading damage to the 4616303144: OUTPUT FLANGE and other driveline components.
Technical Specifications
| Parameter | Specification |
|---|---|
| OEM Part Number | 4616.104.004 |
| Material | Case-hardened alloy steel (gears), ductile iron housing |
| Weight | Approx. 18.5 kg (40.8 lbs) |
| Overall Diameter | 285 mm |
| Axle Spline Count | 32 (input side) |
| Bearing Type | Tapered roller bearings (pre-loaded) |
| OEM Reference | ZF WG 65 Series |
| Lubrication | SAE 80W-90 GL-5 gear oil |
Compatibility
This differential is precision-machined for the ZF WG 65 transmission series. Based on its design and spline configuration, the 4616.104.004 is also compatible with the following ZF models: WG 65, WG 80, WG 120, and WG 180 series gearboxes. It may also be found in certain WG 200 applications where the final drive ratio matches. Always verify the output flange interface using the 4616303144: OUTPUT FLANGE as a reference point for fitment confirmation.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4616105415 | OUTPUT | Transfers torque from differential to axle shafts |
| 4616303144 | OUTPUT FLANGE | Connects differential output to driveshaft |
| 4616101094 | TRANSMISSION HOUSING | Encloses and supports differential assembly |
| 0636011038 | HEXAGON SCREW | Secures differential bearing caps |
| 0636011118 | HEXAGON SCREW | Fastens housing cover to main case |
| 0636016015 | HEXAGON SCREW | Mounts output flange to differential |
| 0631306085 | CYLINDRICAL PIN | Aligns differential housing halves |
| 0634313118 | O-RING | Seals differential cover joint |
| 0732611049 | FILTER INSERT | Traps debris in lubrication circuit |
| 0634303718 | O-RING | Seals output flange shaft bore |
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