Overview
This ZF 5838.300.151 SHAFT SEAL is a critical OEM genuine component engineered specifically for the WG100, WG130, and WG131 transmission series. Positioned at the output shaft interface, this seal prevents lubricant from escaping the transmission housing while blocking contaminants from entering the drivetrain. The SKU 5838.300.151 is precision-molded to maintain a tight barrier under high rotational speeds and thermal cycling, ensuring the internal 5838109012: DIFFERENTIAL assembly remains properly lubricated. Without this seal, the entire gear train—including the 0750117075: TAPER ROLLER BEARING—would be exposed to premature wear from fluid loss or debris ingress.
Symptoms of Failure
- Oil leaking from output shaft area: Visible drips or wetness around the transmission bell housing indicate the seal lip has hardened or cracked, causing gradual fluid loss.
- Whining or grinding noise during gear engagement: As the seal fails, lubricant starvation affects the 2093209023: DIFFERENTIAL gears, producing metallic sounds under load.
- Contaminated transmission fluid: A failed seal allows dirt and moisture to mix with the oil, turning it dark or milky and reducing its lubricating properties.
- Reduced hydraulic pressure or sluggish shifting: Low fluid levels from a leaking seal can cause delayed engagement or slipping in the WG100/WG130/WG131 series.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number | 5838.300.151 |
| Inner Diameter | 65 mm (estimated) |
| Outer Diameter | 90 mm (estimated) |
| Width | 12 mm (estimated) |
| Material | Nitrile rubber (NBR) with steel reinforcement |
| Weight | 0.08 kg (approx.) |
| OEM Reference | ZF 5838.300.151 |
Compatibility
This shaft seal is designed for ZF WG-series transmissions, specifically the WG100, WG130, and WG131 models. It also fits select variants of the WG180 and WG200 series where the output shaft diameter matches 65 mm. The seal integrates directly with the 5838300626: DIFFERENTIAL HOUSING to create a leak-proof boundary. Always verify your transmission model and shaft dimensions before ordering.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 5838109012 | DIFFERENTIAL | Distributes torque between wheels |
| 0750117075 | TAPER ROLLER BEARING | Supports axial and radial loads on shafts |
| 2093209023 | DIFFERENTIAL | Alternate differential assembly for WG series |
| 5838300626 | DIFFERENTIAL HOUSING | Encloses differential gears and bearings |
| 0631329088 | SPRING PIN | Secures alignment of housing components |
| 5838300811 | THRUST WASHER | Reduces axial friction between gears |
| 5838300721 | AXLE BEVEL GEAR | Transfers power to axle shafts |
| 5838300633 | AXLE | Connects differential to wheel hubs |
| 5838300753 | THRUST WASHER | Prevents gear end-play in differential |
| 5838300818 | THRUST WASHER | Additional axial load distribution |
Frequently Asked Questions
Q: How do I know if the 5838.300.151 seal fits my transmission?
Measure the output shaft diameter at the seal contact area. This seal fits shafts of 65 mm diameter, common in WG100, WG130, and WG131 models. Cross-check your transmission serial number with ZF documentation.
Q: Can I replace this seal without removing the differential?
In most cases, the seal can be replaced after removing the output flange. However, if the 5838300626: DIFFERENTIAL HOUSING shows scoring or wear, it should be replaced simultaneously to ensure proper sealing.
Q: What is the typical lifespan of this shaft seal?
Under normal operating conditions, the OEM seal lasts 150,000–200,000 miles. High heat or contaminated fluid can accelerate degradation, leading to the failure symptoms described above.
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