Overview
The ZF 2099.117.056 REAR AXLE HOUSING is a critical structural component within the final drive assembly of heavy-duty construction machinery. This OEM genuine part encloses the differential and axle shafts, providing the rigid mounting point necessary to transfer torque from the transmission to the wheels. As the central load-bearing shell, it protects internal gears from contamination while maintaining precise alignment under extreme stress. The SKU 2099.117.056 is engineered to ZF’s exacting tolerances, ensuring a direct fit and long service life in demanding environments such as wheel loaders and graders.
Symptoms of Failure
- Visible oil seepage from axle housing seals: Cracks or porosity in the housing allow lubricant to escape, leading to low oil levels and accelerated wear on internal components.
- Unusual grinding or whining noise during turns: A warped or damaged housing misaligns the DIFFERENTIAL (2099109045), causing gear tooth interference and audible distress.
- Vibration under load: Structural fatigue in the housing permits flexing, which destabilizes the TAPER ROLLER BEARING (0750117075) and leads to uneven tire wear.
- Difficulty engaging drive or wheel lock-up: Severe housing deformation can pinch the DIFFERENTIAL (2093209094) assembly, preventing free rotation.
Technical Specifications
| Specification | Value |
|---|---|
| OEM Part Number | 2099.117.056 |
| Material | High-strength ductile iron (GJS-500-7) |
| Overall Length | 620 mm |
| Mounting Bolt Pattern | 12 x M16 on 280 mm PCD |
| Dry Weight | 38.5 kg |
| Axle Tube Inner Diameter | 95 mm |
| Compatible Differential Case | DIFF.HOUSING (2093309078) |
Compatibility
This rear axle housing is designed for ZF’s WG series powershift transmissions, specifically the WG180, WG200, and WG211 models used in construction machinery. It also fits select variants of the 4WG-200 and 6WG-200 drivelines. The housing accommodates both standard and limited-slip differential configurations. For a complete rebuild, pair this housing with the DIFFERENTIAL AXLE (2097309085) and the AXLE BEVEL GEAR (4482360002) to restore full drivetrain integrity.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 2099109045 | DIFFERENTIAL | Distributes torque between left and right wheels |
| 0750117075 | TAPER ROLLER BEARING | Supports axle shaft radial and axial loads |
| 2093209094 | DIFFERENTIAL | Alternative differential assembly for WG200 |
| 2093309078 | DIFF.HOUSING | Encloses differential gears and bearings |
| 0631100223 | SPRING PIN | Secures differential gear shaft alignment |
| 0730300820 | THRUST WASHER | Reduces axial friction in differential assembly |
| 4482360002 | AXLE BEVEL GEAR | Transfers power from pinion to differential |
| 2097309085 | DIFFERENTIAL AXLE | Connects differential to wheel hubs |
| 5838300811 | THRUST WASHER | Prevents gear end-play in differential |
| 4482360001 | DIFFERENTIAL BEVEL GEAR | Mesh with side gears for speed differentiation |
