ZF 4168.028.377 CONVERTER Torque Converter Assembly | Complete Unit

Overview

The ZF 4168.028.377 CONVERTER Torque Converter Assembly is a critical hydraulic component responsible for transferring engine torque to the transmission input shaft within the WG 94 Series gearbox. As a complete unit, this torque converter assembly modulates power delivery through fluid coupling, enabling smooth vehicle acceleration and load management. The SKU 4168.028.377 designates a factory-spec replacement that integrates directly with the 4661101024 TRANSMISSION HOUSING and the 4661301054 HOUSING II to form the sealed converter housing chamber. Proper installation also requires securing the assembly with the 0631306174 CYLINDRICAL PIN for alignment, and affixing the 0769123894 TYPE PLATE for identification after service.

Symptoms of Failure

• Torque converter shudder at low speeds — A pronounced vibration during acceleration from a stop, often caused by worn clutch friction material inside the unit.
• Transmission fluid overheating — Persistent high operating temperatures due to internal stator failure or lock-up clutch slippage.
• Delayed or harsh engagement — Noticeable lag when shifting from Park to Drive or Reverse, accompanied by a hard clunk as the converter fills.
• Whining or grinding noise from bell housing — Metallic sounds indicating bearing wear or impeller vane damage within the converter assembly.

Technical Specifications

Compatibility

This torque converter assembly is engineered for ZF WG 94 Series transmissions, including models such as WG180, WG200, and WG211. These gearboxes are commonly found in heavy-duty construction equipment, municipal trucks, and industrial loaders. The 4168.028.377 unit directly replaces worn converters in these applications without requiring modifications to the 4661101024 TRANSMISSION HOUSING or the 4661301054 HOUSING II. Always verify the bell housing bolt pattern and pilot bore dimensions against your existing unit before installation.

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