ZF 4143.302.100 INPUT SHAFT for WG100/WG130/WG131 | OEM Genuine Part

Overview

The ZF 4143.302.100 INPUT SHAFT is a precision-machined component engineered for the WG100, WG130, and WG131 transmission series. This OEM genuine part transmits torque from the engine directly into the planetary gearset, acting as the primary rotational interface within the gear train. Located at the front of the main housing, the input shaft mates with the clutch pack and the 4143101025: HOUSING to ensure concentric alignment under heavy loads. The SKU 4143.302.100 is manufactured to ZF’s original tolerances, guaranteeing a direct fit without modification. When paired with the 4143301055: HOUSING, this shaft maintains proper oil flow channels for lubrication of the forward gears.

Symptoms of Failure

• Torque converter shudder under acceleration: A worn input shaft spline causes intermittent engagement, producing a vibration that worsens at highway speeds.
• Transmission fluid leaks from the front pump area: Degraded sealing surfaces on the shaft allow ATF to escape past the 0634303266: O-RING, leaving puddles under the bell housing.
• Delayed or harsh engagement from Park to Drive: Excessive axial play in the input shaft prevents the clutch packs from seating fully, creating a 2-3 second lag before gear engagement.
• Metallic debris in the transmission pan: Flaking or spalling on the shaft’s bearing journals generates fine steel particles that contaminate the hydraulic circuit.

Technical Specifications

Compatibility

This input shaft is directly compatible with ZF’s WG series powershift transmissions, specifically the WG100, WG130, and WG131 models. It also fits select HL 100 Series and HL 270 Series applications where the same input geometry is used. The shaft interfaces with the 4143298040: CASE and is secured using the 0631329135: SPRING PIN to prevent rotational drift. For WG180 and WG200 transmissions, verify the spline count matches your existing shaft before ordering. This part is not intended for use with older WG50 or WG80 variants without adapter modifications.

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