ZF 4143.351.078 OUTER CLUTCH DISK for HL 100/HL 270 | OEM Genuine Part

Overview

The ZF 4143.351.078 OUTER CLUTCH DISK is a critical friction component engineered for the HL 100 and HL 270 series transmissions. Positioned within the clutch pack assembly, this OEM genuine part transfers torque between rotating shafts and stationary housings during gear engagement. The SKU 4143.351.078 specifically functions as the outermost steel separator plate, providing the necessary clamping surface for the friction discs. When installed alongside the 4143101025 HOUSING and 4143301055 HOUSING, this disk ensures precise hydraulic pressure distribution within the clutch drum assembly.

Symptoms of Failure

• Delayed or harsh shifting – Worn outer clutch disks cause hesitation between gear changes, particularly when the transmission is under load.
• Transmission fluid contamination – Degraded friction material from the 4143.351.078 disk creates metallic debris in the oil, visible as dark particles during drain intervals.
• Torque converter shudder – A vibrating sensation during acceleration at low RPM indicates uneven clutch pack engagement due to warped or glazed outer disks.
• Loss of reverse or forward drive – Complete failure of this disk results in the transmission slipping out of gear entirely, often accompanied by a burning smell.

Technical Specifications

Compatibility

This outer clutch disk is designed for ZF HL 100 and HL 270 series transmissions, including models such as WG180, WG200, WG210, and WG250. It also fits select ZF 4WG-200 and 6WG-200 variants used in heavy-duty construction and agricultural equipment. The disk integrates directly with the 4143298040 CASE and is secured using the 0631329135 SPRING PIN to prevent rotation during operation. Always verify your transmission serial number before installation.

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