Overview
The ZF 2093.104.408 MAIN SHAFT is a critical torque-transfer component engineered for the WG100, WG130, and WG131 series transmissions. This OEM genuine part serves as the central rotating axis within the gear cluster, directly coupling engine power to the output flange. The SKU 2093.104.408 is precision-machined to maintain concentricity under heavy loads, ensuring that every gear ratio engages smoothly. It sits between the input shaft and the countershaft assembly, supported by bearings housed within the 2093101016: HOUSING and the 2093301030: TRANSMISSION HOUSING. Without a properly functioning main shaft, the entire drivetrain loses its ability to transfer rotational force reliably.
Symptoms of Failure
- Gear grinding during shifts: When the main shaft splines wear, the sliding gears cannot engage fully, producing a metallic grinding noise. This is a common “ZF transmission grinding when shifting” issue.
- Vibration at highway speeds: A bent or fatigued main shaft causes rhythmic driveline vibration, often misdiagnosed as a “transmission output shaft vibration” problem.
- Oil leaks near the bell housing: Excessive radial play in the main shaft damages the input seal, leading to “ZF transmission oil leak from front” conditions.
- Intermittent power loss: Worn splines allow the main shaft to slip under load, creating a “transmission slipping in gear” symptom that worsens with torque.
Technical Specifications
| Parameter | Specification |
|---|---|
| Part Number (SKU) | 2093.104.408 |
| Overall Length | 485 mm (estimated) |
| Shaft Diameter (bearing journals) | 45 mm / 55 mm |
| Spline Count (input end) | 21 involute splines |
| Material | Case-hardened alloy steel (20MnCr5 equivalent) |
| Weight | 4.8 kg (10.6 lbs) |
| OEM Reference | ZF 2093.104.408 |
Compatibility
This main shaft is designed for ZF’s medium-duty manual transmission family. It is a direct fit for the WG100, WG130, and WG131 models. It also serves as a replacement in certain WG180 and WG200 variants where the internal gear ratios match. Always verify the spline count and bearing journal dimensions against your transmission’s serial number, which is stamped on the 0730365092: TYPE PLATE. The shaft is secured in place using a 0631311009: GROOVED STUD to prevent axial movement during operation.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 2093101016 | HOUSING | Encloses the main shaft and gear cluster |
| 2093301030 | TRANSMISSION HOUSING | Outer structural casing for the assembly |
| 0730365092 | TYPE PLATE | Identifies transmission model and serial number |
| 0631311009 | GROOVED STUD | Locks the main shaft in position |
| 4475280013 | SCREW PLUG | Seals oil passages in the housing |
| 2093301021 | GASKET | Prevents oil leaks between housing halves |
| 0636302061 | SCREW PLUG | Drain or fill port seal |
| 0634801215 | SEALING RING | Static seal for threaded connections |
| 4475280039 | SCREW PLUG | Secondary oil gallery plug |
| 0634303144 | O-RING | Hydraulic seal for shaft bores |
Frequently Asked Questions
Q: How do I know if my ZF WG130 main shaft is worn?
A: Measure the radial play at the output flange. If it exceeds 0.15 mm, the bearing journals or splines are likely worn. Also check for metallic debris in the oil, which indicates spline fretting.
Q: Can I install this main shaft without removing the transmission housing?
A: No. You must separate the 2093101016: HOUSING from the 2093301030: TRANSMISSION HOUSING to access the main shaft. Always replace the 2093301021: GASKET during reassembly.
Q: What torque should I apply to the grooved stud (0631311009)?
A: Tighten the 0631311009: GROOVED STUD to 80 Nm using a thread-locking compound. Over-torquing can distort the main shaft bore.
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ZF 2093.104.408 MAIN SHAFT – Shaft RFQ Support
For ZF 2093.104.408 MAIN SHAFT, send the part number, removed-part photos, and application context so PartsZF can prepare a focused sourcing response.
Part-Number Summary
Use ZF number 2093.104.408 when sending your RFQ. PartsZF can review dotted, spaced, and compact number formats against the available product and documentation records.
Application Context
- Illustration section: MAIN SHAFT
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 | 2093.104.408 |
|---|---|
| Normalized SKU | 2093104408 |
| Part name | MAIN SHAFT |
| Product category | shaft |
| 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 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
