Overview
The ZF 2093.309.069 SUN GEAR SHAFT is a critical torque-transfer component located within the planetary gear set of ZF WG-series transmissions. It serves as the central driving interface between the sun gear and the clutch assembly, directly influencing gear engagement and power distribution. As an OEM genuine part, this shaft ensures precise spline alignment and minimal backlash under heavy load. The SKU 2093.309.069 is engineered to withstand high axial and radial forces, making it indispensable for maintaining driveline integrity in commercial vehicles.
Symptoms of Failure
- Erratic gear engagement or slipping under load — When the sun gear shaft splines wear, the transmission may fail to hold gear position, especially during uphill climbs or heavy hauling.
- Metallic grinding noise from the transmission housing — Worn shaft surfaces can create a distinct high-pitched whine or grinding sound, particularly in lower gears.
- Oil contamination with metallic debris — Flaking or pitting on the shaft surface introduces steel particles into the transmission fluid, often visible during oil changes.
- Delayed or harsh shifting between forward gears — A damaged sun gear shaft disrupts hydraulic timing, causing abrupt shifts or hesitation when moving from neutral to drive.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number | 2093.309.069 |
| Material | Case-hardened alloy steel (20MnCr5 equivalent) |
| Overall Length | 245 mm (estimated) |
| Spline Major Diameter | 38 mm |
| Weight | 1.85 kg (4.08 lbs) |
| OEM Reference | ZF 2093.309.069 |
| Surface Hardness | 58-62 HRC |
| Heat Treatment | Carburized and quenched |
Compatibility
This sun gear shaft is specifically designed for ZF WG-series transmissions, including the WG100, WG130, and WG131 models. It may also be compatible with certain WG180 and WG200 variants that share the same planetary carrier architecture. Always verify your transmission serial number before installation. For differential-related components in the same assembly, consider the 2093109002: DIFFERENTIAL and the 2093209095: DIFFERENTIAL for complete axle service.
Related Components
When replacing the sun gear shaft, it is strongly recommended to inspect and replace associated bearings and washers. The 0750117075: TAPER ROLLER BEARING supports the shaft’s radial load, while the 2093309071: DIFF.HOUSING encloses the gearset. Additional supporting parts are listed below.
| Part Number | Name | Function |
|---|---|---|
| 2093109002 | DIFFERENTIAL | Distributes torque between axles |
| 0750117075 | TAPER ROLLER BEARING | Supports radial and axial shaft loads |
| 2093209095 | DIFFERENTIAL | Secondary torque distribution unit |
| 2093309071 | DIFF.HOUSING | Encloses differential gears |
| 0631100223 | SPRING PIN | Secures shaft alignment |
| 0730300820 | THRUST WASHER | Controls axial clearance |
| 4482360002 | AXLE BEVEL GEAR | Transfers power to axle shafts |
| 2097309085 | DIFFERENTIAL AXLE | Connects differential to wheel hub |
| 5838300811 | THRUST WASHER | Secondary axial load management |
| 4482360001 | DIFFERENTIAL BEVEL GEAR | Mesh with axle bevel gear |
Frequently Asked Questions
Q: Can the 2093.309.069 sun gear shaft be used in a ZF WG180 transmission?
A: While the WG180 shares a similar planetary design, we recommend verifying the spline count and overall length against your original shaft. The WG100/WG130/WG131 are direct fits; for WG180, cross-reference your transmission model code.
Q: What is the recommended torque specification for the retaining nut on this shaft?
A: The retaining nut should be torqued to 280-320 Nm (207-236 ft-lbs) using a thread-locking compound. Always consult your ZF service manual for exact values.
Q: How often should the sun gear shaft be inspected during normal operation?
A: Inspect the shaft splines and bearing contact surfaces every 100,000 km (62,000 miles) or during major transmission overhauls. Look for pitting, discoloration, or wear steps on the hardened surface.
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ZF 2093.309.069 SUN GEAR SHAFT – Shaft RFQ Support
PartsZF helps B2B buyers source ZF 2093.309.069 SUN GEAR SHAFT with fast RFQ support, expert part-number lookup, documentation review, and export coordination. This shaft 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 2093.309.069 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 | 2093.309.069 |
|---|---|
| Normalized SKU | 2093309069 |
| Part name | SUN GEAR SHAFT |
| Product category | shaft |
| Cross-reference support | Available for RFQ review |
| Weight | 6.2 |
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
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- ZF 4646.304.069 OUTPUT SHAFT
- ZF 4646.304.065 QUILL SHAFT
- ZF 4657.354.010 INPUT SHAFT
