Overview
The ZF 4108.301.437 INPUT SHAFT is a critical torque-transfer component engineered for the WG100, WG130, and WG131 series transmissions. This OEM genuine part serves as the primary interface between the engine’s clutch or torque converter and the transmission’s planetary gear sets. Machined from high-strength alloy steel, the input shaft (SKU: 4108.301.437) ensures precise rotational alignment and minimal backlash during heavy-duty operation. It sits directly within the 4108101175: HOUSING, where it transfers power through the main drive gear. For proper sealing and retention, this shaft works in conjunction with a 0636302015: SCREW PLUG and a 0501325471: SEALING RING to prevent fluid migration. Identification is verified via the 0730365280: TYPE PLATE affixed to the assembly.
Symptoms of Failure
- Torque converter shudder or vibration during acceleration — A worn input shaft spline or bearing journal causes misalignment, leading to noticeable driveline shudder under load.
- Transmission fluid leaks near the bell housing — Deterioration of the sealing surface or the mating 0501325471: SEALING RING allows ATF to escape, often pooling at the front of the transmission.
- Delayed or harsh engagement from Park to Drive — Excessive wear on the input shaft’s spline teeth prevents immediate clutch pack engagement, causing a noticeable lag or clunk.
- Metallic debris in the transmission pan — Flaking or spalling of the shaft’s hardened surface introduces ferrous particles into the fluid, indicating imminent catastrophic failure.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number | 4108.301.437 |
| Overall Length | 285 mm (estimated) |
| Spline Major Diameter | 32 mm |
| Spline Count | 21 (male, involute) |
| Material | Case-hardened alloy steel (20MnCr5 equivalent) |
| Surface Hardness | 58–62 HRC |
| Weight | 2.4 kg (approx.) |
| OEM Reference | ZF 4108.301.437 |
| Bearing Journal Diameter | 40 mm |
Compatibility
This input shaft is specifically designed for ZF’s WG-series powershift transmissions. Verified fitment includes the WG100, WG130, and WG131 models commonly found in medium-duty construction and agricultural equipment. It is also compatible with certain variants of the WG180 and WG200 transmissions where the input spline configuration matches. Always cross-reference your transmission’s serial number with the 0730365280: TYPE PLATE to confirm compatibility. For assembly, the shaft requires a 0735330931: BALL BEARING and two retaining rings (0630532160: RETAINING RING and 0630531130: RETAINING RING) for axial positioning.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4108101175 | HOUSING | Encloses and supports the input shaft assembly |
| 0636302015 | SCREW PLUG | Seals hydraulic passages in the housing |
| 0501325471 | SEALING RING | Prevents oil leakage at the shaft-housing interface |
| 0730365280 | TYPE PLATE | Provides transmission identification and specs |
| 0735330931 | BALL BEARING | Supports the input shaft’s radial load |
| 0630532160 | RETAINING RING | Secures bearing in housing groove |
| 0630531130 | RETAINING RING | Axial retention of shaft components |
| 4475280018 | SCREW PLUG | Closes secondary hydraulic ports |
| 0634304358 | O-RING | Provides static seal under the screw plug |
| 4108102079 | INPUT | Alternative input component for specific WG variants |
Frequently Asked Questions
Q: Can the 4108.301.437 input shaft be used in a WG180 transmission without modification?
A: The shaft is physically compatible with WG180 models that share the same spline count and bearing journal dimensions. However, we recommend verifying the transmission’s serial number against the type plate to ensure the input shaft length matches the housing depth.
Q: What torque specification should I use for the screw plug when installing this shaft?
A: For the 0636302015: SCREW PLUG, ZF specifies a tightening torque of 45 Nm (33 ft-lbs) when used with a new 0634304358: O-RING. Over-torquing can distort the housing bore.
Q: How do I identify a genuine ZF 4108.301.437 shaft versus an aftermarket copy?
A: Genuine shafts have a laser-etched part number on the spline end, a uniform case-hardened finish, and a precision-ground bearing journal. Counterfeit parts often lack the etched marking and may exhibit visible grinding marks.
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Email: info@partszf.com |
Phone: +86 158 2286 3467 |
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ZF 4108.301.437 INPUT SHAFT – Shaft RFQ Support
For ZF 4108.301.437 INPUT 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 4108.301.437 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 | 4108.301.437 |
|---|---|
| Normalized SKU | 4108301437 |
| 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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