ZF 6002.199.025 SYNCHRONIZER | OEM Genuine Part

Overview

The ZF 6002.199.025 SYNCHRONIZER is a precision-engineered component designed to facilitate smooth gear engagement within heavy-duty ZF transmissions. Positioned between the main shaft and the gear cluster, this OEM genuine part ensures that rotational speeds are matched before a gear is selected, eliminating grinding and reducing drivetrain shock. The SKU 6002.199.025 is critical for maintaining shift quality in construction machinery, where frequent direction changes and high torque loads demand reliable synchronization. When paired with a robust 2094104412: MAIN SHAFT, this synchronizer forms the core of a durable shifting assembly.

Symptoms of Failure

• Gear clash or grinding during upshifts: A worn synchronizer fails to equalize shaft speeds, producing a harsh metallic noise when engaging higher gears.
• Difficulty engaging reverse gear: As the brass or steel cone wears, operators may experience resistance or a “double-clutch” requirement to get the transmission into reverse.
• Premature gear jumping out of mesh: If the synchronizer hub or slider wears unevenly, the transmission may pop out of gear under load, especially in lower ranges.
• Increased shift lever effort: A failing 6002.199.025 creates excessive friction, requiring more force to move the shift rail and engage the gear.

Technical Specifications

Compatibility

This synchronizer is engineered for ZF WG series powershift transmissions commonly used in wheel loaders, graders, and telehandlers. It is a direct fit for the WG180, WG200, and WG211 models. The part also appears in certain ZF 4WG-200 and 6WG-200 variants. For proper installation, ensure the 2094304054: MAIN SHAFT is inspected for wear, as a damaged shaft will accelerate synchronizer failure. The 2094106010: SHIFT SYSTEM and 2094206001: GEARSHIFT SHAFT must also be in good condition to ensure proper alignment and engagement force.

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