Overview
The ZF 2093.309.027 GEAR RING is a critical OEM genuine component engineered for the WG100, WG130, and WG131 transmission series. This precision-machined ring gear sits within the differential assembly, directly engaging with the pinion gear to transfer rotational force from the driveshaft to the axle shafts. As a load-bearing element, it ensures smooth torque distribution and driveline synchronization under heavy-duty industrial conditions. The SKU 2093.309.027 is manufactured to ZF’s exacting tolerances, guaranteeing a direct fit and long service life when paired with a matching 2093109002: DIFFERENTIAL assembly.
Symptoms of Failure
- Whining or howling noise during acceleration: A worn gear ring produces a distinct high-pitched whine, especially under load, indicating uneven tooth contact or pitting on the ring gear surface.
- Intermittent gear slipping or clunking: As the ring gear teeth wear, the differential may lose positive engagement, causing a sudden clunk or momentary loss of drive power when transitioning between forward and reverse.
- Metallic debris in transmission fluid: Flakes or fine metal particles found during oil changes signal advanced wear of the ring gear, often accompanied by a rough rotation feel in the driveline.
- Vibration through the chassis at highway speeds: An unbalanced or warped gear ring creates cyclical vibrations that intensify with speed, often misdiagnosed as a driveshaft issue.
Technical Specifications
| Specification | Value |
|---|---|
| Part Number (SKU) | 2093.309.027 |
| Material | Case-hardened alloy steel (20MnCr5 equivalent) |
| Outer Diameter | ~210 mm (estimated) |
| Inner Diameter | ~120 mm (estimated) |
| Tooth Count | 37 teeth (estimated) |
| Weight | ~4.8 kg (10.6 lbs) |
| OEM Reference | ZF 2093.309.027 |
| Surface Hardness | 58-62 HRC |
Compatibility
This gear ring is specifically designed for ZF WG100, WG130, and WG131 transmissions. It also fits select WG180 and WG200 series models that share the same differential housing architecture. Always verify the ring gear tooth profile against your existing unit. For a complete differential rebuild, consider replacing the 0750117075: TAPER ROLLER BEARING and the 2093209095: DIFFERENTIAL assembly simultaneously to ensure optimal gear mesh and bearing preload.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 2093109002 | DIFFERENTIAL | Houses the ring gear and spider gears; distributes torque to axle shafts |
| 0750117075 | TAPER ROLLER BEARING | Supports differential carrier rotation and axial loads |
| 2093209095 | DIFFERENTIAL | Alternate differential assembly for WG131 variants |
| 2093309071 | DIFF.HOUSING | Outer casing that encloses the differential and ring gear |
| 0631100223 | SPRING PIN | Secures differential pinion shaft within the carrier |
| 0730300820 | THRUST WASHER | Reduces axial friction between differential gears and housing |
| 4482360002 | AXLE BEVEL GEAR | Transfers power from differential to axle shaft |
| 2097309085 | DIFFERENTIAL AXLE | Output shaft connecting differential to wheel hub |
| 5838300811 | THRUST WASHER | Controls end-play of differential side gears |
| 4482360001 | DIFFERENTIAL BEVEL GEAR | Mates with axle bevel gear to enable speed differentiation |
Frequently Asked Questions
Q: Can I install the 2093.309.027 gear ring without replacing the differential housing?
A: Yes, the ring gear mounts directly to the differential carrier. However, if the 2093309071: DIFF.HOUSING shows scoring or cracks, replacement is recommended to maintain proper gear alignment.
Q: What torque specification should I use for the ring gear bolts?
A: ZF typically specifies 120–140 Nm for M12 ring gear bolts, but always consult your service manual. Using a new 0631100223: SPRING PIN is advised to prevent fastener loosening.
Q: How do I identify a genuine ZF 2093.309.027 versus an aftermarket copy?
A: Genuine parts have a laser-etched ZF logo and part number on the outer face. The tooth profile will match OEM specifications exactly, and the case-hardening depth should exceed 1.2 mm.
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ZF 2093.309.027 GEAR RING – Gear RFQ Support
PartsZF helps B2B buyers source ZF 2093.309.027 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 2093.309.027 when sending your RFQ. PartsZF can review dotted, spaced, and compact number formats against the available product and documentation records.
Application Context
- Illustration section: REAR AXLE HOUSING
- Illustration section: REAR AXLE HOUS.
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 | 2093.309.027 |
|---|---|
| Normalized SKU | 2093309027 |
| Part name | 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.
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- ZF 4657.354.044 OUTPUT GEAR
- ZF 4644.306.326 GEAR SHIFT HOUSING
