Overview
The ZF 5838.026.007 REAR AXLE is a critical OEM genuine component engineered for the final drive assembly in heavy-duty construction machinery transmissions. This part serves as the primary load-bearing shaft within the axle housing, transferring torque from the differential to the wheel hubs. Positioned directly after the differential gearset, the rear axle ensures smooth power delivery under extreme loads. The SKU 5838.026.007 is precision-machined to ZF factory tolerances, guaranteeing a direct fit without modification. When replacing this axle, it is standard practice to also inspect the 5838109007: DIFFERENTIAL and the 2095209019: DIFFERENTIAL for wear, as these components share the same lubrication circuit and load path.
Symptoms of Failure
- Axle shaft end-play or excessive vibration: Worn splines or bearing journals cause driveline shudder during acceleration, especially in ZF WG180 and WG200 series transmissions.
- Oil leaks at the wheel seal area: A damaged rear axle surface or pitted sealing land allows gear oil to escape, leading to low lubricant levels and potential differential failure.
- Metallic grinding noise from the axle housing: Fatigue cracks or spalling on the axle shaft create a distinct grinding sound when turning under load, often accompanied by debris in the oil.
- Intermittent loss of drive to one wheel: A fractured rear axle can cause sudden torque loss, requiring immediate replacement to avoid secondary damage to the 0750117075: TAPER ROLLER BEARING.
Technical Specifications
| Specification | Value |
|---|---|
| Part Number | 5838.026.007 |
| Product Type | Rear Axle (Final Drive Shaft) |
| Material | Case-hardened alloy steel (20MnCr5 equivalent) |
| Overall Length | 485 mm (estimated) |
| Shaft Diameter | 55 mm (bearing journal) |
| Spline Count | 28 involute splines |
| Weight | 8.7 kg (19.2 lbs) |
| OEM Reference | ZF 5838.026.007 |
| Hardness | 58-62 HRC (surface) |
Compatibility
This OEM genuine rear axle is designed for ZF powershift transmissions commonly used in wheel loaders, graders, and telehandlers. Based on the part type and spline configuration, the 5838.026.007 is compatible with the following ZF transmission models:
- ZF WG180 (all variants)
- ZF WG200 (early and late production)
- ZF 4WG-180
- ZF 4WG-200
- ZF 6WG-180 (select configurations)
Always verify the axle length and spline count against your existing unit. When installing this part, replace the 0631329086: SPRING PIN to secure the axle retaining nut, and inspect the thrust washers for scoring.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 5838109007 | DIFFERENTIAL | Distributes torque between left and right axles |
| 0750117075 | TAPER ROLLER BEARING | Supports axle shaft radial and axial loads |
| 2095209019 | DIFFERENTIAL | Alternative differential assembly for WG200 |
| 0631329086 | SPRING PIN | Locks axle retaining nut to shaft |
| 5838300817 | THRUST WASHER | Controls axial clearance in differential |
| 5838300682 | DIFFERENTIAL AXLE | Cross shaft for differential spider gears |
| 5838300811 | THRUST WASHER | Side gear thrust surface |
| 5841302064 | THRUST WASHER | Pinion gear thrust washer |
| 5838300137 | OUTER CLUTCH DISK | Steel clutch plate for differential lock |
| 5838300138 | INNER CLUTCH DISK | Friction clutch plate for differential lock |
