ZF 4657.330.098 CONVERTER BELL for WG190/WG210 | OEM Genuine Part

Overview

The ZF 4657.330.098 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 4657.330.098, serves as the rigid mounting interface between the engine flywheel housing and the transmission, ensuring precise alignment of the converter assembly. It also houses the starter ring gear and provides the primary seal surface to prevent fluid contamination. When paired with the 4657101088: TRANSMISSION HOUSING, it forms the forward section of the transmission envelope, directly influencing drivetrain stability and hydraulic circuit integrity.

Symptoms of Failure

• Torque converter fluid leaks at the bell housing seam – Worn sealing surfaces or cracks in the bell cause transmission fluid to pool around the bell-to-engine interface, often mistaken for a rear main seal failure.
• Metallic grinding or knocking during gear engagement – Distortion of the bell housing allows the torque converter to contact the housing interior, producing audible noise under load.
• Vibration through the chassis during acceleration – Misalignment from a damaged bell housing transfers converter imbalance directly to the vehicle frame, especially noticeable in WG210-equipped trucks.
• Starter motor engagement failure – Cracks or wear at the starter mounting boss prevent proper pinion-to-ring gear alignment, leading to intermittent starting issues.

Technical Specifications

Compatibility

This converter bell is engineered for ZF WG190 and WG210 series transmissions, which are commonly found in medium-duty trucks, buses, and off-highway equipment. It is also compatible with the WG180 and WG200 variants when used with the appropriate 4657201183: HOUS.FRONT SECT adapter. For full assembly integrity, always verify that the 4657201184: HOUSING REAR PART and 4657298111: HOUSING REAR SECTION match the bell housing bolt pattern. This part does not fit ZF 4HP or 5HP series transmissions.

Related Components

Frequently Asked Questions

Q: Can the 4657.330.098 bell housing be repaired if cracked?
A: No. Cast iron bell housings that develop cracks or warpage must be replaced. Welding or machining repairs compromise the alignment tolerances required for proper torque converter operation and will lead to premature bearing failure.

Q: Does this part include the starter ring gear?
A: No. The converter bell is supplied as a bare housing. The starter ring gear must be transferred from your existing assembly or ordered separately. Inspect the ring gear teeth for wear before installation.

Q: What torque specification should be used for the bell housing bolts?
A: ZF specifies 85 Nm (63 ft-lbs) for the M12 cap screws (part 0636100801) and 45 Nm (33 ft-lbs) for the M10 cap screws (part 0636100803). Always use new bolts and apply thread locker to prevent loosening from thermal cycling.