Overview
The ZF 4143.302.043 INPUT SHAFT is a precision-machined, OEM genuine component engineered for the WG100, WG130, and WG131 transmission series. This shaft transmits engine torque directly from the torque converter to the planetary gearset, making it a critical element in the driveline. As a high-stress rotating part, it must maintain exact concentricity and surface hardness to ensure smooth power delivery. The SKU 4143.302.043 is the definitive OEM reference for this input shaft, and it is typically installed within the main 4143101016: HOUSING assembly. During a rebuild, the shaft is often paired with a new 0501318136: GASKET and secured using the 0636101084: CAP SCREW to prevent oil migration and maintain clamping force.
Symptoms of Failure
- Transmission gear slipping under load: A worn input shaft spline can no longer positively engage the clutch hub, causing the transmission to slip out of gear during acceleration.
- Torque converter shudder or vibration: Bearing journal wear on the shaft leads to misalignment, producing a noticeable shudder at specific RPM ranges.
- Oil leaks from the bell housing area: A damaged shaft seal surface or worn pilot bearing bore allows transmission fluid to weep past the 4143301039: HOUSING interface.
- Metallic debris in the transmission pan: Flaking or spalling on the shaft’s hardened surface generates fine metal particles that contaminate the hydraulic system.
Technical Specifications
| Specification | Detail |
|---|---|
| Part Number | 4143.302.043 |
| OEM Reference | ZF 4143.302.043 |
| Material | Case-hardened alloy steel (20MnCr5 equivalent) |
| Overall Length | Approx. 285 mm |
| Spline Major Diameter | 32 mm |
| Bearing Journal Diameter | 25 mm |
| Weight | 1.8 kg (4.0 lbs) |
| Surface Hardness | 58–62 HRC |
| Compatible Seal | 0634801057: SEALING RING |
Compatibility
This input shaft is specifically designed for the ZF WG100, WG130, and WG131 series transmissions. It also fits the HL 100 and HL 270 series gearboxes, which share the same input shaft geometry. While primarily used in these models, it may be cross-referenced for certain WG180 and WG200 applications where the spline count and pilot bearing dimensions match. Always verify the shaft’s pilot diameter against your existing 4143201019: VALVE INSERT and the 0634306198: O-RING groove depth before final installation.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4143101016 | HOUSING | Encloses the input shaft and planetary assembly |
| 4143301039 | HOUSING | Rear housing supporting the output shaft |
| 0501318136 | GASKET | Seals the housing-to-shaft interface |
| 0636101084 | CAP SCREW | Secures the input shaft bearing retainer |
| 0750108044 | PLUG | Closes unused hydraulic ports |
| 0636302014 | SCREW PLUG | Seals oil passages in the valve body |
| 0634801057 | SEALING RING | Prevents fluid bypass around the shaft |
| 0730365092 | TYPE PLATE | Identification plate for transmission model |
| 4143201019 | VALVE INSERT | Regulates hydraulic pressure to the clutch |
| 0634306198 | O-RING | Seals the valve insert bore |
ZF 4143.302.043 INPUT SHAFT – Shaft RFQ Support
For ZF 4143.302.043 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 4143.302.043 when sending your RFQ. PartsZF can review dotted, spaced, and compact number formats against the available product and documentation records.
Application Context
- Illustration section: INPUT
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 | 4143.302.043 |
|---|---|
| Normalized SKU | 4143302043 |
| 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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