ZF 4681.330.001 CONVERTER BELL for BP210/BP230 | OEM Genuine Part

Overview

The ZF 4681.330.001 CONVERTER BELL is a critical structural component designed specifically for the BP210 and BP230 series transmissions. This OEM genuine part serves as the rigid housing that connects the torque converter assembly to the main gearbox casing, ensuring precise alignment of the rotating assembly. The SKU 4681.330.001 is engineered to withstand high torsional loads and thermal expansion, acting as the primary interface between the engine flywheel housing and the transmission. Without this bell housing, the torque converter cannot be properly seated, leading to immediate driveline failure. It works in concert with the TRANSMISSION HOUSING to create a sealed, oil-tight environment for the rotating components.

Symptoms of Failure

When the ZF 4681.330.001 converter bell begins to wear or crack, operators will notice distinct failure modes. Oil leaks at the bell housing seam are the most common indicator, often mistaken for a rear main seal failure. Torque converter misalignment causing gear slipping occurs when the bell housing mounting face becomes warped, altering the converter’s engagement depth. Excessive driveline vibration at idle suggests the bell housing has developed hairline fractures, compromising structural rigidity. Difficulty in transmission removal or installation often points to corrosion or deformation of the bell housing bolt holes, which can strip if the part is not replaced promptly.

Technical Specifications

Compatibility

This genuine ZF 4681.330.001 converter bell is engineered for the BP210 and BP230 transmission families. It is also directly compatible with the WG180 and WG200 series when used with the appropriate adapter kit. The part fits all variants of the Ecomat 2 and Ecomat 4 models that share the same bell housing bolt pattern. For complete assembly, this bell housing must be paired with the HOUS.FRONT SECT and the HOUSING REAR PART to form the full transmission casing. The CASE assembly also relies on this bell housing for structural integrity.

Related Components

Frequently Asked Questions

Q: Can the ZF 4681.330.001 converter bell be repaired if cracked?
A: No. Due to the high-stress nature of this component and its role in torque converter alignment, ZF recommends only OEM replacement. Welding or patching can introduce warpage that leads to premature bearing failure.

Q: Is this part interchangeable between BP210 and BP230 transmissions?
A: Yes. The 4681.330.001 is a shared part across both the BP210 and BP230 series. However, always verify the bolt pattern matches your specific engine flywheel housing (SAE #3 or SAE #2).

Q: What torque specification should be used for the cap screws securing this bell housing?
A: For the CAP SCREW (0636100801), tighten to 85 Nm. For the CAP SCREW (0636100803), use 45 Nm. Always use new bolts and apply thread locker.