Overview
The ZF 2093.309.117 Sun Gear Shaft is a precision-engineered component designed for the planetary gear set within ZF WG100, WG130, and WG131 transmissions. This OEM genuine part, identified by SKU 2093.309.117, serves as the central driving shaft that transfers torque from the input to the planetary gears, enabling smooth ratio changes under heavy load. It sits directly inside the differential housing, meshing with the DIFFERENTIAL assembly and supporting the TAPER ROLLER BEARING that maintains axial stability. Without this shaft, the transmission cannot distribute power to the output shaft, making it a critical wear item in high-mileage industrial vehicles.
Symptoms of Failure
- Grinding noise during gear engagement: A worn sun gear shaft produces a metallic grinding sound, especially when shifting from neutral to drive, indicating damaged splines or surface pitting.
- Transmission slipping under load: As the shaft loses tooth contact, the transmission may slip or hesitate when climbing grades or hauling heavy loads, a classic sign of gear fatigue.
- Metal debris in transmission fluid: Flakes or fine metallic particles found during oil changes point to accelerated wear on the sun gear shaft and its mating DIFFERENTIAL components.
- Vibration at specific RPM ranges: Excessive play in the shaft bearing surfaces causes harmonic vibration, often felt through the chassis between 1500–2000 RPM.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number | 2093.309.117 |
| Material | Case-hardened alloy steel (20MnCr5 equivalent) |
| Overall Length | 185 mm (estimated) |
| Spline Diameter | 32 mm (estimated) |
| Weight | 1.8 kg (4.0 lbs) |
| OEM Reference | ZF 2093.309.117 |
| Heat Treatment | Carburized & tempered to HRC 58-62 |
| Related Part: Spring Pin | 0631100223 |
| Related Part: Thrust Washer | 0730300820 |
| Related Part: Axle Bevel Gear | 4482360002 |
| Related Part: Differential Axle | 2097309085 |
| Related Part: Thrust Washer (Alt) | 5838300811 |
| Related Part: Differential Bevel Gear | 4482360001 |
Compatibility
This sun gear shaft is engineered for ZF WG-series transmissions, specifically the WG100, WG130, and WG131 models. It is also compatible with the DIFF.HOUSING found in WG180 and WG200 variants, though shaft length may vary. Always verify your transmission serial number before ordering. The part directly interfaces with the differential carrier assembly and requires proper shimming using the listed thrust washers.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 2093109056 | DIFFERENTIAL | Distributes torque to axle shafts |
| 0750117075 | TAPER ROLLER BEARING | Supports radial and axial loads on shaft |
| 2093209094 | DIFFERENTIAL | Secondary differential unit for dual-axle setups |
| 2093309078 | DIFF.HOUSING | Encloses differential gears and shaft |
| 0631100223 | SPRING PIN | Secures shaft to planetary carrier |
| 0730300820 | THRUST WASHER | Reduces axial end-play |
| 4482360002 | AXLE BEVEL GEAR | Transfers power to wheel axles |
| 2097309085 | DIFFERENTIAL AXLE | Connects differential to wheel hubs |
| 5838300811 | THRUST WASHER | Alternate axial clearance shim |
| 4482360001 | DIFFERENTIAL BEVEL GEAR | Primary gear inside differential carrier |
Frequently Asked Questions
Q: Can I use this sun gear shaft in a ZF WG180 transmission?
A: While the spline pattern is identical, the WG180 uses a longer housing. We recommend measuring your existing shaft length and comparing it to the 185 mm specification of the 2093.309.117. For WG180 applications, you may need the DIFF.HOUSING adapter kit.
Q: What is the typical lifespan of this shaft under normal operating conditions?
A: With proper lubrication and no contamination, the case-hardened steel shaft typically lasts 500,000 to 700,000 km in on-highway use. Off-road or heavy-load applications may reduce this to 300,000 km. Regular oil analysis helps detect early wear.
Q: Do I need to replace the taper roller bearing at the same time?
A: Yes, we strongly recommend replacing the TAPER ROLLER BEARING (0750117075) whenever the sun gear shaft is swapped. The bearing race often develops matching wear patterns that can cause premature failure if reused.
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Phone: +86 158 2286 3467 |
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ZF 2093.309.117 SUN GEAR SHAFT – Shaft RFQ Support
PartsZF supports RFQ preparation for ZF 2093.309.117 SUN GEAR SHAFT where shaft identification and documentation review are required before ordering.
Part-Number Summary
Use ZF number 2093.309.117 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 | 2093.309.117 |
|---|---|
| Normalized SKU | 2093309117 |
| Part name | SUN GEAR SHAFT |
| Product category | shaft |
| RFQ support | Part-number lookup and documentation review |
| Media support | Product photo or diagram review when available |
| Weight | 8.116 |
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 2094.110.011 P.T.O. SHAFT
- ZF 2094.110.014 P.T.O. SHAFT
- ZF 4642.303.002 OUTPUT SHAFT
- ZF 2093.110.011 P.T.O. SHAFT
- ZF 5838.300.106 INPUT SHAFT
