Overview
The ZF 4108.301.450 INPUT SHAFT is a precision-engineered OEM genuine component designed for the WG100, WG130, and WG131 series transmissions. This critical part transfers torque directly from the engine clutch to the transmission’s planetary gear sets, making it the primary load-bearing shaft in the driveline. The SKU 4108.301.450 is manufactured to ZF’s exacting tolerances to ensure minimal backlash and maximum power transfer efficiency. When installed alongside the 4108101097: HOUSING, this input shaft creates a sealed, lubricated chamber that protects internal gears from contamination and wear.
Symptoms of Failure
- Transmission gear slipping under load: A worn input shaft spline or bearing journal causes intermittent engagement, especially during acceleration or hill climbing.
- Oil leaks at the front seal area: Shaft wear or scoring damages the sealing surface, allowing transmission fluid to escape past the 0501325471: SEALING RING.
- Abnormal vibration or whining noise: Bent or unbalanced input shafts create harmonic vibrations that resonate through the 4108201307: HOUSING assembly.
- Hard shifting or delayed engagement: Excessive axial play in the shaft prevents proper clutch pack compression, leading to rough gear changes.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number / SKU | 4108.301.450 |
| Overall Length | 385 mm |
| Shaft Diameter (bearing journal) | 45 mm |
| Spline Count (input end) | 21-tooth involute spline |
| Material | Case-hardened 20MnCr5 alloy steel |
| Surface Hardness | 58–62 HRC |
| Weight | 2.85 kg |
| OEM Reference | ZF 4108.301.450 (Genuine) |
| Torque Capacity | 1,200 Nm (peak) |
Compatibility
This input shaft is engineered exclusively for ZF WG-series transmissions. Verified compatible models include the WG100, WG130, and WG131. It is also suitable for certain WG180 and WG200 variants that share the same input spline geometry and bearing spacing. Always verify the 0730365280: TYPE PLATE on your transmission housing to confirm exact model designation before ordering. The shaft interfaces directly with the 0501215601: OIL LEVEL GAGE tube bracket on WG130 units.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4108101097 | HOUSING | Encloses the input shaft and planetary gear set |
| 4108201307 | HOUSING | Rear housing supporting output shaft bearings |
| 0501215601 | OIL LEVEL GAGE | Dipstick for checking transmission fluid level |
| 0501325471 | SEALING RING | Prevents oil leakage at shaft exit point |
| 0730365280 | TYPE PLATE | Identification plate with transmission model data |
| 0750116277 | BALL BEARING | Supports input shaft radial load |
| 0630502039 | RETAINING RING | Secures bearing in housing bore |
| 0630531064 | RETAINING RING | Axial lock for shaft snap ring groove |
| 0636302014 | SCREW PLUG | Seals oil gallery access port |
| 0634801057 | SEALING RING | Copper gasket for plug sealing |
Frequently Asked Questions
Q: Can the 4108.301.450 input shaft be used in a WG200 transmission?
A: Yes, but only if the WG200 has the same 21-tooth spline and 45 mm bearing journal. Check your transmission’s type plate (part 0730365280) to confirm compatibility before installation.
Q: What torque specification should I use for the retaining ring installation?
A: The retaining rings (0630502039 and 0630531064) do not require torque; they snap into place. However, the screw plug (0636302014) should be tightened to 25 Nm with a new sealing ring (0634801057).
Q: How do I know if my input shaft is bent?
A: Place the shaft on V-blocks and rotate it with a dial indicator. Runout exceeding 0.05 mm indicates a bent shaft requiring replacement. A bent shaft will also cause premature wear of the ball bearing (0750116277).
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ZF 4108.301.450 INPUT SHAFT – Shaft RFQ Support
PartsZF supports RFQ preparation for ZF 4108.301.450 INPUT SHAFT where shaft identification and documentation review are required before ordering.
Part-Number Summary
Use ZF number 4108.301.450 when sending your RFQ. PartsZF can review dotted, spaced, and compact number formats against the available product and documentation records.
Application Context
- Illustration section: HOUSING
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 | 4108.301.450 |
|---|---|
| Normalized SKU | 4108301450 |
| Part name | INPUT 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.
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