Overview
The ZF 4143.103.003 OUTPUT is a critical OEM genuine component engineered for the HL 100 Series and HL 270 Series transmission families. This output assembly serves as the final power delivery interface, transferring torque from the transmission’s planetary gear set to the driveline. Positioned at the rear of the main housing, it ensures precise rotational alignment and load distribution under high-stress industrial conditions. The SKU 4143.103.003 is manufactured to ZF’s exacting tolerances, guaranteeing a direct fit and long service life when replacing worn units. For complete assembly integrity, this part is often installed alongside the 4143101009: HOUSING and the 4143301025: HOUSING, which provide structural support and sealing surfaces.
Symptoms of Failure
- Oil leaks at the rear output seal: A worn 4143.103.003 output often causes transmission fluid to seep past the seal, leaving visible drips under the vehicle or machine. This is a common long-tail search query for “ZF output shaft oil leak repair.”
- Gear slipping under load: When the output component loses its dimensional stability, the transmission may hesitate or slip during acceleration, particularly in higher gears. Operators searching for “ZF transmission slipping when loaded” will find this symptom relevant.
- Unusual whining or grinding noises: Bearing surface degradation within the output assembly produces a distinct metallic whine that increases with road speed. This matches queries like “ZF transmission whining noise after replacement.”
- Vibration in the driveline: A failing output can cause noticeable shuddering through the chassis, especially during deceleration. This symptom is frequently searched as “ZF transmission vibration at highway speed.”
Technical Specifications
| Specification | Value |
|---|---|
| Part Number (SKU) | 4143.103.003 |
| OEM Reference | ZF Genuine |
| Material | Forged alloy steel, induction-hardened |
| Weight | 4.2 kg (9.3 lbs) |
| Overall Length | 215 mm |
| Output Flange Diameter | 85 mm |
| Spline Count | 24 (internal) |
| Sealing Surface Finish | Ra 0.4 µm |
| Related Seal Kit | 4143298457: SEAL KIT |
| Required O-Ring | 0634313603: O-RING |
| Mounting Hardware | 0636101068: CAP SCREW |
| Support Ring | 0501342341: SUPPORT RING |
Compatibility
This genuine ZF output is designed primarily for the HL 100 Series and HL 270 Series transmissions. Based on its spline geometry and flange dimensions, it is also compatible with select models in the WG180, WG200, and Ecomat 4HP families where the output housing configuration matches. Always verify the spline count and pilot bore before installation. For proper sealing, pair this output with the 0634313591: O-RING and the 4475280018: SCREW PLUG to prevent fluid loss. Additionally, the 4143221013: THROTTLE VALVE and 0634304484: O-RING are frequently replaced during the same service interval to restore full hydraulic control.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4143101009 | HOUSING | Encloses the output shaft and supports bearings |
| 4143301025 | HOUSING | Provides additional structural rigidity to the output assembly |
| 0634313603 | O-RING | Seals the interface between output and housing |
| 4475280018 | SCREW PLUG | Closes oil passages in the output area |
| 0501342341 | SUPPORT RING | Prevents O-ring extrusion under high pressure |
| 4143298457 | SEAL KIT | Contains all seals and gaskets for output overhaul |
| 0634313591 | O-RING | Secondary seal for output flange |
| 0636101068 | CAP SCREW | Fastens the output assembly to the housing |
| 4143221013 | THROTTLE VALVE | Regulates hydraulic pressure to the output clutch |
| 0634304484 | O-RING | Seals the throttle valve bore |
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