Overview
The ZF 4143.302.076 INPUT SHAFT is a precision-machined, OEM genuine component engineered for the WG100, WG130, and WG131 transmission series. As the primary torque-transfer element, this shaft connects the engine output directly to the transmission’s planetary gearset, ensuring smooth power delivery and reliable engagement under heavy loads. The SKU 4143.302.076 is a direct factory replacement, manufactured to ZF’s exacting tolerances for spline fit and rotational balance. During installation, this shaft interfaces with the 4143101009 HOUSING and the 4143301025 HOUSING, which together form the sealed bearing cavity that supports the shaft’s high-speed rotation.
Symptoms of Failure
- Oil leaks at the front seal area: A worn input shaft bearing journal or seal surface allows transmission fluid to escape, often seen as drips beneath the bell housing.
- Gear slipping under load: Damaged splines on the 4143.302.076 shaft fail to engage the clutch hub properly, causing intermittent power loss during acceleration or hill climbing.
- Vibration or whining noise: Excessive radial play from a fatigued shaft leads to audible bearing noise and driveline vibration that intensifies with engine RPM.
- Hard shifting or delayed engagement: A bent or worn input shaft disrupts hydraulic timing, resulting in harsh shifts or a noticeable lag when moving from Neutral to Drive.
Technical Specifications
| Specification | Value |
|---|---|
| Part Number (SKU) | 4143.302.076 |
| Overall Length | 312 mm (estimated) |
| Spline Diameter | 28 mm (input end) |
| Material | Case-hardened alloy steel (20MnCr5 equivalent) |
| Weight | 2.4 kg (5.3 lbs) |
| OEM Reference | ZF 4143.302.076 |
| Sealing Surface Hardness | HRC 58-62 |
Compatibility
This genuine input shaft is designed for ZF’s WG-series powershift transmissions. It is a direct fit for the WG100, WG130, and WG131 models. Based on spline geometry and shaft length, it may also be compatible with the WG180 and WG200 series when used with the correct bearing carrier. Always verify the shaft’s pilot diameter against your transmission’s torque converter hub. For a complete rebuild, pair this shaft with the 0634313603 O-RING to seal the housing joint, and use the 4475280018 SCREW PLUG to secure the oil gallery.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4143101009 | HOUSING | Front bearing support for input shaft |
| 4143301025 | HOUSING | Rear housing enclosing clutch pack |
| 0634313603 | O-RING | Seals housing-to-shaft interface |
| 4475280018 | SCREW PLUG | Closes oil passage in housing |
| 0501342341 | SUPPORT RING | Reinforces shaft bearing race |
| 4143298457 | SEAL KIT | Complete set of gaskets and seals |
| 0634313591 | O-RING | Secondary seal for oil circuit |
| 0636101068 | CAP SCREW | Fastens housing halves together |
| 4143221013 | THROTTLE VALVE | Modulates shift pressure |
| 0634304484 | O-RING | Seals throttle valve bore |
ZF 4143.302.076 INPUT SHAFT – Shaft RFQ Support
PartsZF supports RFQ preparation for ZF 4143.302.076 INPUT SHAFT where shaft identification and documentation review are required before ordering.
Part-Number Summary
Use ZF number 4143.302.076 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 | 4143.302.076 |
|---|---|
| Normalized SKU | 4143302076 |
| 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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- ZF 5838.300.106 INPUT SHAFT
