Overview
The ZF 4143.302.018 INPUT SHAFT is a precision-machined component engineered for the WG100, WG130, and WG131 transmission series. This OEM genuine part transmits engine torque from the torque converter directly into the planetary gearset, serving as the primary rotational interface within the gear train. As a critical driveline element, the SKU 4143.302.018 ensures concentric alignment and minimal backlash under heavy load conditions. It integrates directly with the 4143101009: HOUSING and the 4143301025: HOUSING to form the sealed input assembly, while the 0634313603: O-RING and 4475280018: SCREW PLUG secure the hydraulic circuit around the shaft.
Symptoms of Failure
- Torque converter shudder or vibration: A worn input shaft spline causes uneven load transfer, producing noticeable driveline shudder during acceleration or deceleration.
- Transmission fluid leakage at the bell housing: Degraded sealing surfaces on the shaft allow ATF to weep past the 0634313591: O-RING, leaving puddles under the vehicle.
- Gear engagement delay or slipping: Excessive axial play in the input shaft prevents proper clutch pack engagement, resulting in delayed shifts or complete loss of drive in forward gears.
- Metallic debris in the transmission pan: Flaking or spalling on the shaft’s bearing journals generates ferrous particles that contaminate the hydraulic system.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number | 4143.302.018 |
| Overall Length | 285 mm (estimated) |
| Spline Major Diameter | 32 mm |
| Material | Case-hardened alloy steel (20MnCr5 equivalent) |
| Weight | 1.85 kg (4.08 lbs) |
| OEM Reference | ZF 4143 302 018 |
| Surface Treatment | Black oxide with induction-hardened splines |
Compatibility
This input shaft is designed for ZF’s modular HL-series transmissions. It is a direct fit for the WG100, WG130, and WG131 models. Based on spline geometry and shaft length, it also serves as a replacement in the WG180 and WG200 series when used with the appropriate 0501342341: SUPPORT RING. For complete overhaul, pair this shaft with the 4143298457: SEAL KIT and the 0636101068: CAP SCREW to ensure proper torque retention. Always verify the 4143221013: THROTTLE VALVE calibration when replacing the input shaft to maintain shift quality.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4143101009 | HOUSING | Encloses the input shaft and supports the front bearing |
| 4143301025 | HOUSING | Intermediate housing for clutch pack alignment |
| 0634313603 | O-RING | Seals the input shaft bore against fluid loss |
| 4475280018 | SCREW PLUG | Closes the oil gallery access port |
| 0501342341 | SUPPORT RING | Provides axial support for the shaft bearing |
| 4143298457 | SEAL KIT | Contains all gaskets and seals for input shaft replacement |
| 0634313591 | O-RING | Secondary seal for the torque converter hub |
| 0636101068 | CAP SCREW | Fastens the input shaft retaining plate |
| 4143221013 | THROTTLE VALVE | Regulates line pressure based on shaft speed |
| 0634304484 | O-RING | Seals the throttle valve bore |
ZF 4143.302.018 INPUT SHAFT – Shaft RFQ Support
For ZF 4143.302.018 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 4143.302.018 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 | 4143.302.018 |
|---|---|
| Normalized SKU | 4143302018 |
| 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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