Overview
The ZF 2099.117.029 REAR AXLE HOUSING is a critical structural component within heavy-duty construction machinery drivelines. This OEM genuine part serves as the rigid casing that encloses the differential assembly, axle shafts, and final drive gears, ensuring precise alignment under extreme torque loads. Designed to withstand high-impact stress from off-road applications, the housing also functions as an oil reservoir for lubricating internal rotating assemblies. The SKU 2099.117.029 is specifically engineered to interface with ZF’s modular axle system, providing mounting points for suspension components and brake calipers. When paired with a 2099109046 DIFFERENTIAL, this housing maintains optimal gear mesh patterns, directly influencing power transfer efficiency to the wheels.
Symptoms of Failure
- Rear axle housing oil seepage at weld seams: Cracks in the cast iron housing cause gradual lubricant loss, often visible as dark residue around the differential cover or axle tube junctions.
- Persistent gear whine during loaded turns: Housing distortion misaligns the 0750117075 TAPER ROLLER BEARING seats, creating uneven tooth contact patterns in the ring and pinion set.
- Vibration under acceleration from 20-40 km/h: Worn housing bearing bores allow the 2093209094 DIFFERENTIAL to oscillate, transmitting resonant frequencies through the chassis.
- Metal debris in differential oil: Housing internal fractures shed ferrous particles, often misdiagnosed as gear wear without inspecting the 2093309078 DIFF.HOUSING for stress cracks.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number | 2099.117.029 |
| Material | GJS-500-7 Ductile Cast Iron |
| Dry Weight | 38.2 kg (84.2 lbs) |
| Overall Length | 1,245 mm |
| Axle Tube Diameter | 120 mm |
| Oil Capacity | 6.8 liters |
| OEM Reference | ZF 2099.117.029 |
Compatibility
This rear axle housing is engineered for ZF’s WG180, WG200, and WG250 series transmissions commonly deployed in wheel loaders, telehandlers, and graders. It directly replaces housings on ZF APL-300 and APL-350 axle configurations. The casting accommodates both standard and limited-slip differential carriers. For complete rebuilds, verify that the housing bore dimensions match your existing 2097309085 DIFFERENTIAL AXLE shaft journals. Always inspect the 0631100223 SPRING PIN bores for elongation before installation.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 2099109046 | DIFFERENTIAL | Distributes torque between axle shafts |
| 0750117075 | TAPER ROLLER BEARING | Supports differential carrier rotation |
| 2093209094 | DIFFERENTIAL | Spider gear assembly for wheel speed differentiation |
| 2093309078 | DIFF.HOUSING | Carrier housing for differential gears |
| 0631100223 | SPRING PIN | Secures differential pinion shaft |
| 0730300820 | THRUST WASHER | Controls axial play in differential gears |
| 4482360002 | AXLE BEVEL GEAR | Transfers power from pinion to ring gear |
| 2097309085 | DIFFERENTIAL AXLE | Output shaft connecting differential to wheel hub |
| 5838300811 | THRUST WASHER | Prevents gear face scoring under load |
| 4482360001 | DIFFERENTIAL BEVEL GEAR | Side gear for axle shaft engagement |
