Overview
The ZF 5838.300.624 INNER GEAR RING is a precision-machined component designed for the planetary gear set within ZF WG100, WG130, and WG131 transmissions. This OEM genuine part functions as the internal ring gear that meshes directly with the planet gears, transferring torque from the input shaft to the differential assembly. As a critical element of the gear train, the 5838.300.624 ensures smooth power distribution and load sharing across the transmission. When paired with a 5838109010: DIFFERENTIAL, this inner gear ring maintains proper gear alignment and reduces parasitic power loss. The SKU 5838.300.624 is manufactured to ZF’s original tolerances, guaranteeing a direct fit without modification.
Symptoms of Failure
- Whining or grinding noise during acceleration: A worn inner gear ring produces a distinct metallic whine that intensifies under load, often misdiagnosed as wheel bearing failure.
- Intermittent gear slipping under heavy torque: When the internal teeth wear unevenly, the planet gears lose engagement, causing the transmission to momentarily slip before re-engaging.
- Metallic debris in transmission fluid: Flaking or pitting on the gear ring surface releases fine steel particles into the oil, visible during routine fluid changes.
- Vibration at specific RPM ranges: A damaged inner gear ring creates harmonic vibrations that resonate through the driveline, particularly between 1800-2200 RPM.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number | 5838.300.624 |
| Material | Case-hardened alloy steel (20MnCr5 equivalent) |
| Inner Diameter | 124.5 mm |
| Outer Diameter | 168.3 mm |
| Face Width | 32.0 mm |
| Number of Teeth | 72 internal |
| Weight | 1.85 kg |
| OEM Reference | ZF 5838.300.624 |
| Hardness | 58-62 HRC |
Compatibility
This inner gear ring is engineered specifically for ZF WG-series transmissions. Verified compatible models include WG100, WG130, and WG131. It also fits select WG180 and WG200 variants produced between 2005-2018, though cross-referencing the transmission serial number is recommended. The 5838.300.624 interfaces directly with the 0750117075: TAPER ROLLER BEARING that supports the planetary carrier, and it works in conjunction with the 2093209023: DIFFERENTIAL to distribute torque to the output shafts. For complete assembly, the 5838300626: DIFFERENTIAL HOUSING encloses the entire gear set, ensuring proper lubrication and alignment.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 5838109010 | DIFFERENTIAL | Distributes torque between left and right axles |
| 0750117075 | TAPER ROLLER BEARING | Supports planetary carrier radial loads |
| 2093209023 | DIFFERENTIAL | Secondary torque distribution unit |
| 5838300626 | DIFFERENTIAL HOUSING | Encloses and protects gear assembly |
| 0631329088 | SPRING PIN | Secures gear ring to housing |
| 5838300811 | THRUST WASHER | Controls axial clearance in gear set |
| 5838300721 | AXLE BEVEL GEAR | Transfers power to axle shafts |
| 5838300633 | AXLE | Connects differential to wheel hubs |
| 5838300753 | THRUST WASHER | Reduces friction on axle bevel gear |
| 5838300818 | THRUST WASHER | Secondary axial load management |
Frequently Asked Questions
Q: Can the 5838.300.624 inner gear ring be installed without removing the transmission?
A: No. This component is located deep within the planetary gear set and requires full transmission disassembly. Accessing the gear ring necessitates removing the differential housing and the 5838300626: DIFFERENTIAL HOUSING to expose the ring gear.
Q: How does this part differ from the outer ring gear in the same transmission?
A: The 5838.300.624 is an internal ring gear with teeth cut on the inside diameter, meshing with planet gears. Outer ring gears have external teeth and serve different torque paths. Always verify the part number before ordering.
Q: What is the typical service life of this inner gear ring under normal operating conditions?
A: With proper lubrication and regular fluid changes, the 5838.300.624 typically lasts 300,000-500,000 km. Premature failure often results from contaminated oil or a failing 0750117075: TAPER ROLLER BEARING that introduces metal debris into the gear mesh.
📞 Need this part? Contact our ZF specialists:
Email: info@partszf.com |
Phone: +86 158 2286 3467 |
Request a Quote →
ZF 5838.300.624 INNER GEAR RING – Gear RFQ Support
Use ZF 5838.300.624 INNER GEAR RING as the reference when requesting gear support. Photos, visible markings, and transmission context help reduce sourcing uncertainty.
Part-Number Summary
Use ZF number 5838.300.624 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 | 5838.300.624 |
|---|---|
| Normalized SKU | 5838300624 |
| Part name | INNER GEAR RING |
| Product category | gear |
| RFQ support | Part-number lookup and documentation review |
| Media support | Product photo or diagram review when available |
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 4661.302.010 GEAR
- ZF 2094.306.024 GEAR SHIFT RAIL
- ZF 4642.353.026 SPUR GEAR
- ZF 4143.142.013 GEAR SHIFT SENSOR
- ZF 4143.142.022 GEAR SHIFT SENSOR
