Overview
The ZF 4143.102.414 INPUT is a critical OEM genuine component designed for high-torque ZF transmission assemblies. This part functions as the primary input shaft or input hub, transferring rotational force from the engine directly into the gear train of the transmission. Positioned at the front of the main housing, it interfaces directly with the torque converter and the clutch pack. The SKU 4143.102.414 is engineered to exact factory tolerances, ensuring precise alignment and minimal backlash during operation. When replacing this unit, it is common to inspect the adjacent 4143101009: HOUSING for wear, as the input shaft seats directly within this casting.
Symptoms of Failure
- Transmission gear slipping under load: A worn input shaft spline or bearing surface causes intermittent engagement, leading to power loss during acceleration.
- Oil leaks at the front bell housing: Degraded sealing surfaces on the input shaft allow ATF to escape, often pooling near the torque converter area.
- Abnormal whining or grinding noises: Metal fatigue or pitting on the input gear teeth generates audible noise, especially in neutral or low gear.
- Delayed engagement from Park to Drive: Excessive wear on the input hub reduces hydraulic pressure response, causing a noticeable lag.
Technical Specifications
| Specification | Value |
|---|---|
| Part Number | 4143.102.414 |
| OEM Reference | ZF 4143.102.414 |
| Material | Case-hardened alloy steel (20MnCr5) |
| Overall Length | 185 mm (approx.) |
| Spline Diameter | 32 mm (input end) |
| Weight | 1.85 kg |
| Seal Surface Finish | Ra 0.4 µm |
Compatibility
This genuine ZF input component is primarily compatible with the HL 100 Series and HL 270 Series transmission families. Based on its spline profile and bearing journal dimensions, it also fits select models in the WG180 and WG200 series, as well as certain Ecomat 4HP variants. Always verify the input shaft length against your specific transmission housing. For a complete seal replacement, pair this part with the 0634313603: O-RING and the 4475280018: SCREW PLUG to prevent fluid bypass. Additionally, the 4143301025: HOUSING should be inspected for cracks during installation.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4143101009 | HOUSING | Main structural casing for input shaft support |
| 4143301025 | HOUSING | Intermediate housing for clutch pack alignment |
| 0634313603 | O-RING | Static seal for input shaft bore |
| 4475280018 | SCREW PLUG | Oil gallery sealing plug |
| 0501342341 | SUPPORT RING | Bearing preload spacer |
| 4143298457 | SEAL KIT | Complete gasket and o-ring set |
| 0634313591 | O-RING | Secondary seal for pressure ports |
| 0636101068 | CAP SCREW | Fastener for housing retention |
| 4143221013 | THROTTLE VALVE | Hydraulic pressure modulation |
| 0634304484 | O-RING | Valve body seal |
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