ZF 4143.103.420 OUTPUT | OEM Genuine Part

Overview

The ZF 4143.103.420 OUTPUT is a critical OEM genuine component engineered for the rear power take-off (PTO) or output flange assembly within ZF’s HL 100 and HL 270 series transmissions. This part serves as the primary interface between the transmission housing and the driveline, transferring rotational torque from the gearset to the output shaft. As a precision-machined output component, it ensures concentric alignment and load distribution under high-stress conditions. The SKU 4143.103.420 is specifically designed to mate with the main 4143101025: HOUSING and the 4143301055: HOUSING to form a sealed, rigid assembly. When installed alongside the 4143298040: CASE, this output component provides the structural foundation for the entire driveline connection.

Symptoms of Failure

When the ZF 4143.103.420 OUTPUT begins to wear, operators typically encounter these specific failure modes:

• Oil leakage at the output flange seal – A worn output component often causes the radial seal to lose contact, leading to visible transmission fluid drips beneath the vehicle or equipment.
• Driveline vibration under load – Excessive play in the output bearing seat creates harmonic vibrations that intensify during acceleration or when carrying heavy loads.
• Gear slipping or delayed engagement – Degraded splines on the output shaft prevent positive engagement with the PTO, causing intermittent power loss to auxiliary systems.
• Metallic debris in transmission fluid – Spalling or fretting of the output flange surface generates fine metal particles that contaminate the hydraulic circuit.

Technical Specifications

Compatibility

This OEM output component is engineered for the ZF HL 100 and HL 270 series transmissions. Based on its physical dimensions and spline configuration, the 4143.103.420 is also compatible with the following ZF models that share the same output flange interface: WG180, WG200, WG210, and WG250. It is frequently specified for use in municipal trucks, fire apparatus, and heavy-duty construction equipment where reliable PTO engagement is essential. Always verify the output housing configuration by cross-referencing with the 4143101025: HOUSING and 4143301055: HOUSING to ensure correct fitment.

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