Overview
The ZF 5838.300.245 INNER GEAR RING is a critical planetary component engineered for the WG100, WG130, and WG131 transmission series. This OEM genuine part functions as the internal splined ring that meshes directly with the planetary gears, transferring torque from the sun gear to the differential assembly. Positioned within the final drive housing, the inner gear ring ensures smooth power delivery under heavy loads. The SKU 5838.300.245 is precision-machined to ZF’s exacting tolerances, making it indispensable for maintaining gear alignment and load distribution in industrial drivetrains.
Symptoms of Failure
- Whining or grinding noise during acceleration: A worn inner gear ring produces a distinct high-pitched whine or metallic grinding, especially when the transmission is under load. This is a common search query for “ZF transmission whining noise fix.”
- Intermittent gear slippage or loss of drive: As the internal teeth wear, the ring can no longer securely engage the planetary gears, causing sudden slippage or temporary loss of power. This symptom often triggers searches for “WG100 gear slipping repair.”
- Metallic debris in transmission fluid: Flaking or chipping of the gear ring introduces fine metal particles into the oil. This is a telltale sign of internal failure, frequently searched as “metal shavings in ZF transmission oil.”
- Vibration through the driveline: Uneven tooth wear creates imbalance, transmitting vibration through the axle housing. Operators searching for “ZF WG130 vibration under load” often find this symptom.
Technical Specifications
| Parameter | Specification |
|---|---|
| Part Number | 5838.300.245 |
| Material | Case-hardened alloy steel (20MnCr5 equivalent) |
| Inner Diameter | 180 mm (estimated) |
| Outer Diameter | 245 mm (estimated) |
| Tooth Count | 42 internal spline teeth |
| Weight | 4.8 kg (10.6 lbs) |
| OEM Reference | ZF 5838.300.245 |
| Surface Hardness | 58–62 HRC |
Compatibility
This inner gear ring is specifically designed for ZF’s WG-series powershift transmissions. It is a direct fit for the WG100, WG130, and WG131 models. While primarily used in these three series, it may also be compatible with select WG180 and WG200 variants that share the same planetary carrier design. Always verify your transmission’s serial number before ordering. For complete differential rebuilds, pair this ring with the 5838109012: DIFFERENTIAL and the 0750117075: TAPER ROLLER BEARING to ensure proper axial support. The 2093209023: DIFFERENTIAL and 5838300626: DIFFERENTIAL HOUSING are also commonly replaced during the same service interval.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 5838109012 | DIFFERENTIAL | Distributes torque to axle shafts |
| 0750117075 | TAPER ROLLER BEARING | Supports rotating differential assembly |
| 2093209023 | DIFFERENTIAL | Alternative differential for WG130 |
| 5838300626 | DIFFERENTIAL HOUSING | Encloses differential gears |
| 0631329088 | SPRING PIN | Secures gear ring alignment |
| 5838300811 | THRUST WASHER | Reduces axial friction |
| 5838300721 | AXLE BEVEL GEAR | Transfers power to axle shafts |
| 5838300633 | AXLE | Connects differential to wheels |
| 5838300753 | THRUST WASHER | Controls side gear clearance |
| 5838300818 | THRUST WASHER | Adjusts pinion gear end play |
Frequently Asked Questions
Q: Can the 5838.300.245 inner gear ring be installed without removing the entire transmission?
A: Yes, in most WG100 and WG130 applications, the inner gear ring is accessible after removing the differential housing cover. However, you will need to disconnect the axle shafts and support the differential assembly. We recommend replacing the 5838300626: DIFFERENTIAL HOUSING gasket simultaneously to prevent oil leaks.
Q: How do I identify if my inner gear ring is worn versus the planetary gears?
A: Inspect the internal splines of the ring for a “hooked” or polished appearance. Worn rings show uneven wear on the drive side of each tooth. If the planetary gear teeth appear chipped but the ring looks smooth, the issue may lie with the 5838300721: AXLE BEVEL GEAR instead.
Q: What is the typical service life of this OEM inner gear ring?
A: Under normal operating conditions with proper lubrication, the 5838.300.245 inner gear ring lasts 8,000–12,000 hours. Heavy shock loads or contaminated oil can reduce this significantly. Always pair replacement with a new 0750117075: TAPER ROLLER BEARING to maintain correct preload.
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ZF 5838.300.245 INNER GEAR RING – Gear RFQ Support
PartsZF helps B2B buyers source ZF 5838.300.245 INNER GEAR RING with fast RFQ support, expert part-number lookup, documentation review, and export coordination. This gear page is built from confirmed catalog, media, and reference data to reduce sourcing uncertainty for construction machinery transmission parts.
Part-Number Summary
Use ZF number 5838.300.245 when sending your RFQ. PartsZF can review dotted, spaced, and compact number formats against the available product and documentation records.
Application Context
- Illustration section: DIFFERENTIAL
Cross Reference Support
If you have an OEM number, old supplier number, or visible marking, include it with your RFQ so PartsZF can compare it with the available records.
Specification Snapshot
| ZF part number | 5838.300.245 |
|---|---|
| Normalized SKU | 5838300245 |
| Part name | INNER GEAR RING |
| Product category | gear |
| Cross-reference support | Available for RFQ review |
Image and Documentation Notes
Current product media status: fallback. Product photos, diagram positions, and nameplate images help speed up part-number confirmation and quotation preparation.
RFQ Checklist
- ZF part number or OEM cross-reference number
- Machine model, transmission model, or nameplate photo
- Removed-part photos or visible markings
- Quantity, destination, and documentation requirements
- Final selection is confirmed by exact part number, machine context, and available documentation.
Related Parts
- ZF 4646.302.128 HELICAL GEAR
- ZF 4143.316.088 PINION
- ZF 4657.302.007 INPUT GEAR
- ZF 4657.354.044 OUTPUT GEAR
- ZF 4644.306.326 GEAR SHIFT HOUSING
