ZF 4657.330.046 CONVERTER BELL for WG190/WG210 | OEM Genuine Part

Overview

The ZF 4657.330.046 Converter Bell is a critical structural component that connects the torque converter assembly to the main transmission casing in WG190 and WG210 series units. This OEM genuine part, identified by SKU 4657.330.046, serves as the mounting interface between the engine flywheel housing and the transmission, ensuring precise alignment of the converter assembly. It houses the torque converter and provides the necessary clearance for the converter’s rotation while sealing the transmission’s front end against contaminants. As a genuine ZF component, it guarantees exact fitment and metallurgical integrity required for high-torque industrial applications.

Symptoms of Failure

• Torque converter housing oil leaks – Visible fluid seepage around the bell housing mating surfaces, often mistaken for rear main seal failure, indicates the converter bell has developed stress fractures or gasket surface corrosion.
• Transmission gear slipping under load – When the converter bell distorts from thermal cycling, it misaligns the torque converter, causing intermittent power loss and delayed engagement during acceleration.
• Abnormal vibration at the bell housing area – Worn mounting bosses or cracked bell flanges produce low-frequency rumble that intensifies during converter lockup, particularly noticeable at highway speeds.
• Difficulty mounting the transmission to the engine – Bent or corroded bolt holes in the converter bell prevent proper seating, leading to cross-threaded fasteners and uneven clamping force.

Technical Specifications

Compatibility

This converter bell is specifically engineered for ZF WG190 and WG210 series transmissions, which are commonly found in medium-duty trucks, buses, and construction equipment. It also fits select WG180 and WG200 variants where the torque converter housing interface matches the SAE #3 bolt pattern. Always verify the transmission serial number against the original bell housing dimensions before installation. The part directly interfaces with the 4657101078: TRANSMISSION HOUSING and the 4657201166: HOUS.FRONT SECT to form the complete front transmission assembly. For rear sealing, it works in conjunction with the 4657201168: HOUSING REAR PART and the 4657298101: HOUSING REAR SECTION.

Related Components

Frequently Asked Questions

Q: Can I reuse the old gasket when installing a new converter bell?
A: No. The converter bell gasket surface must be thoroughly cleaned, and a new OEM gasket should always be used to prevent oil leaks. The old gasket will have compressed unevenly and cannot provide a proper seal.

Q: How do I know if my WG190 transmission needs this specific bell housing?
A: Check the casting number on your existing bell housing. If it matches 4657.330.046 and you have symptoms like oil pooling at the bell housing bottom or vibration during converter lockup, replacement is recommended. Measure the bolt hole diameter to confirm SAE #3 pattern compatibility.

Q: Is this part interchangeable between WG190 and WG210 models?
A: Yes, the 4657.330.046 converter bell is physically identical for both WG190 and WG210 series transmissions. However, always verify the torque converter pilot diameter matches your specific unit, as some WG210 variants used a different converter hub size.