Overview
The ZF 4143.302.103 INPUT SHAFT is a precision-machined component designed for the WG100, WG130, and WG131 transmission series. This OEM genuine part transmits engine torque from the clutch or torque converter directly into the planetary gearset, serving as the primary rotational interface between the power source and the gear train. Constructed from high-strength alloy steel, the 4143.302.103 shaft features splined engagement surfaces that ensure positive power transfer under heavy loads. This input shaft works in conjunction with the 4143101031: HOUSING to maintain proper alignment within the transmission case. The SKU 4143.302.103 is a direct OEM replacement, guaranteeing exact fitment and material specifications for ZF HL 100 and HL 270 series applications.
Symptoms of Failure
- Transmission gear slipping under load: Worn splines on the input shaft cause intermittent engagement, leading to power loss during acceleration or hill climbing.
- Oil leaks at the front seal area: A damaged shaft surface or worn bearing journal allows transmission fluid to escape past the seal, leaving puddles under the vehicle.
- Vibration or noise during deceleration: Excessive play between the input shaft and the 4143301055: HOUSING produces a distinct rumbling or whining sound when the driveline is under reverse torque.
- Hard shifting or delayed engagement: A worn input shaft bearing surface creates axial play, causing the clutch pack to engage unevenly and resulting in harsh or delayed gear changes.
Technical Specifications
| Parameter | Specification |
|---|---|
| Part Number | 4143.302.103 |
| Material | Case-hardened alloy steel (20MnCr5 equivalent) |
| Overall Length | 285 mm (estimated) |
| Spline Major Diameter | 32 mm |
| Bearing Journal Diameter | 45 mm |
| Weight | 2.8 kg (6.2 lbs) |
| OEM Reference | ZF 4143.302.103 |
| Hardness | 58-62 HRC (surface) |
Compatibility
This input shaft is engineered for ZF WG-series transmissions, specifically the WG100, WG130, and WG131 models. It also fits select HL 100 and HL 270 series gearboxes where the input shaft design matches the 4143.302.103 spline count and length. For proper installation, verify that the 4143298040: CASE is free of cracks or wear at the bearing bore. The shaft is secured using a 0631329135: SPRING PIN to lock the retaining nut. Additional compatible models include WG180 and WG200 variants when used with the correct housing assembly.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4143101031 | HOUSING | Encloses the input shaft and supports bearing alignment |
| 4143301055 | HOUSING | Secondary housing for clutch pack and shaft support |
| 4143298040 | CASE | Main transmission case housing the gearset |
| 0631329135 | SPRING PIN | Locks input shaft retaining nut in position |
| 0636101024 | CAP SCREW | Secures housing cover to transmission case |
| 4475280099 | SCREW PLUG | Seals oil passages in the housing |
| 0634303266 | O-RING | Prevents fluid leaks at shaft seal interface |
| 4143301045 | SCREEN SHEET | Filters debris from transmission oil flow |
| 0636420051 | COUNTERSUNK SCREW | Mounts oil screen to housing interior |
| 0501200072 | VENT VALVE | Equalizes pressure inside transmission case |
ZF 4143.302.103 INPUT SHAFT – Shaft RFQ Support
For ZF 4143.302.103 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 4143.302.103 when sending your RFQ. PartsZF can review dotted, spaced, and compact number formats against the available product and documentation records.
Application Context
- Illustration section: PLANETARY DRIVE
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 | 4143.302.103 |
|---|---|
| Normalized SKU | 4143302103 |
| 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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