Overview
The ZF 4143.102.405 INPUT is a critical OEM genuine component designed for the HL 100 and HL 270 series transmissions. This part functions as the primary input shaft assembly, transferring torque from the engine directly into the transmission’s planetary gearset. It sits at the front of the gearbox, interfacing with the torque converter and the clutch pack. The SKU 4143.102.405 is engineered to exact ZF specifications, ensuring precise alignment and minimal rotational play. When replacing this unit, it is common to also inspect the 4143101009: HOUSING and the 4143301025: HOUSING for wear, as these components share the same load-bearing assembly.
Symptoms of Failure
- Oil leaks at the front seal area: A worn input shaft can cause the seal to lose contact, leading to visible transmission fluid drips near the bell housing.
- Gear slipping under load: When the input shaft bearing fails, the shaft may wobble, causing intermittent engagement and power loss during acceleration.
- Unusual whining or grinding noises: Damaged splines or bearing surfaces produce a high-pitched whine that increases with engine RPM.
- Delayed engagement when shifting: A failing input shaft can create a lag between selecting a gear and the transmission actually responding, often accompanied by a harsh clunk.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number | 4143.102.405 |
| OEM Reference | ZF 4143.102.405 |
| Material | Case-hardened alloy steel |
| Overall Length | 285 mm (estimated) |
| Shaft Diameter | 45 mm (estimated) |
| Weight | 2.8 kg (estimated) |
| Spline Count | 24 (input side) |
| Seal Surface Finish | Ground and polished |
Compatibility
This input shaft is primarily compatible with the ZF HL 100 Series and HL 270 Series transmissions. It is also frequently used in the WG180 and WG200 models, as well as certain variants of the WG150 and WG210 series. For proper installation, always pair this part with a new 0634313603: O-RING to prevent fluid bypass, and secure it using the 4475280018: SCREW PLUG to lock the shaft in place.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4143101009 | HOUSING | Encloses the input shaft assembly |
| 4143301025 | HOUSING | Secondary housing for bearing support |
| 0634313603 | O-RING | Seals the shaft-to-housing interface |
| 4475280018 | SCREW PLUG | Locks the input shaft in position |
| 0501342341 | SUPPORT RING | Provides axial support for the shaft |
| 4143298457 | SEAL KIT | Contains all seals for the input area |
| 0634313591 | O-RING | Secondary seal for the housing joint |
| 0636101068 | CAP SCREW | Fastens the housing to the transmission |
| 4143221013 | THROTTLE VALVE | Controls hydraulic pressure modulation |
| 0634304484 | O-RING | Seals the throttle valve bore |
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