ZF 4168.028.667 CONVERTER Torque Converter Assembly | Complete Unit

Overview

The ZF 4168.028.667 CONVERTER Torque Converter Assembly is a critical hydraulic coupling component that transfers engine torque to the transmission input shaft within the WG 98 Series. This complete unit replaces worn or damaged torque converters to restore proper fluid coupling and torque multiplication in heavy-duty ZF drivelines. The SKU 4168.028.667 is engineered as a direct-fit assembly, eliminating the need for separate stator, impeller, or turbine purchases. It sits between the engine flywheel and the transmission pump, converting rotational energy into hydraulic power for smooth gear engagement.

Symptoms of Failure

• Transmission shudder or vibration during acceleration — A failing torque converter often causes noticeable shaking when the converter lockup clutch engages, especially at highway speeds.
• Delayed or harsh gear engagement — Worn internal seals or damaged stator splines lead to sluggish shifting from neutral to drive or reverse, a common long-tail search query for “ZF torque converter slipping symptoms.”
• Overheating transmission fluid — A seized or slipping converter generates excessive heat, triggering warning lights or burnt fluid odor. This symptom frequently appears alongside “torque converter overheating WG180.”
• Fluid leaks near the bell housing — Cracks in the converter housing or failed shaft seals cause red transmission fluid to drip, often misdiagnosed as a rear main seal leak.

Technical Specifications

Compatibility

This torque converter assembly is designed for ZF WG 98 Series transmissions, including the WG180, WG200, and WG210 models commonly found in municipal trucks, refuse vehicles, and construction equipment. It also fits select variants of the ZF 6WG200 and 6WG210 where the converter housing interface matches the WG 98 bellhousing pattern. Always verify the pilot bore diameter and flexplate bolt pattern before installation.

When replacing the 4168.028.667, inspect the 4950101004: HOUSING for cracks or warping, as the converter sits directly inside this component. The 4950301018: HOUSING I supports the converter hub and must be free of scoring. A new 0734309932: SHAFT SEAL is strongly recommended during installation to prevent fluid bypass. Additionally, the 4660101023: TRANSMISSION HOUSING should be checked for alignment damage that could cause premature converter wear.

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