ZF 4143.351.026 OUTER CLUTCH DISK for HL 100/HL 270 | OEM Genuine Part

Overview

The ZF 4143.351.026 OUTER CLUTCH DISK is a critical friction component engineered for the HL 100 and HL 270 transmission series. Positioned within the clutch pack assembly, this OEM genuine part transfers torque between rotating shafts under hydraulic pressure. The SKU 4143.351.026 interfaces directly with the 4143101009 HOUSING and the 4143301025 HOUSING, ensuring precise alignment during high-load operations. Designed to withstand extreme thermal cycling, this outer disk maintains consistent friction coefficients across its service life.

Symptoms of Failure

• Delayed gear engagement during cold starts: Worn friction material on the 4143.351.026 reduces hydraulic grip, causing hesitation when shifting from neutral to drive.
• Intermittent clutch slip under load: A degraded outer clutch disk allows torque loss during acceleration, often accompanied by a burning smell from overheated transmission fluid.
• Erratic shift quality with harsh upshifts: Uneven wear on the disk surface creates pressure fluctuations, leading to jarring gear changes in HL 270 units.
• Metallic debris in transmission fluid: Advanced wear releases steel particles from the disk backing, which can clog the 0634313603 O-RING seals and accelerate internal damage.

Technical Specifications

Compatibility

This outer clutch disk is designed for ZF HL 100 and HL 270 series transmissions. It is also compatible with WG180 and WG200 models that share the same clutch pack architecture. The 4143.351.026 works in conjunction with the 4475280018 SCREW PLUG to maintain hydraulic pressure integrity. For complete rebuilds, pair this disk with the 4143298457 SEAL KIT to prevent fluid bypass.

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