Overview
The ZF 4661.330.002 CONVERTER BELL is a critical structural component that houses the torque converter assembly in WG 90 and WG 94 series transmissions. This OEM genuine part, identified by SKU 4661.330.002, serves as the mounting interface between the engine flywheel housing and the transmission main case. It precisely aligns the torque converter with the pump and turbine, ensuring efficient power transfer from the engine to the gearbox. Without this bell housing, the converter would lack the necessary support and alignment, leading to rapid wear of internal seals and bearings. The 4661.330.002 is machined from high-strength cast iron to withstand torsional loads and thermal expansion during heavy-duty operation.
Symptoms of Failure
- Torque converter oil leaks at the bell housing seam: When the 4661.330.002 cracks or warps, transmission fluid seeps between the bell and the main housing, leaving puddles under the vehicle.
- Gear slipping or delayed engagement: A misaligned converter bell causes the torque converter to sit off-center, resulting in erratic hydraulic pressure and slipping during shifts.
- Vibration during acceleration: Worn mounting ears or a distorted bell housing allow the converter to wobble, transmitting harsh vibrations through the driveline.
- Difficulty bolting the transmission to the engine: Bent or corroded bolt holes in the 4661.330.002 prevent proper mating, causing misalignment and premature bearing failure.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number | 4661.330.002 |
| Material | High-strength cast iron (GGG-40) |
| Weight | 18.5 kg (40.8 lbs) |
| Outer Diameter | 420 mm |
| Bolt Hole Pattern | 12-hole, 10.5 mm diameter |
| OEM Reference | ZF 4661.330.002 |
| Surface Treatment | Phosphate coating for corrosion resistance |
Compatibility
This ZF 4661.330.002 CONVERTER BELL is designed for the WG 90 Series and WG 94 Series transmissions. It is also compatible with the WG180 and WG200 models that share the same bell housing bolt pattern and converter depth. For proper installation, ensure the 4661101001: TRANSMISSION HOUSING is free of cracks and the 4661301007: HOUSING is correctly aligned. The 4661301093: TUBE must be inserted into the bell to route lubrication oil, while the 0631306174: CYLINDRICAL PIN ensures dowel alignment during assembly. Always verify your transmission model number before ordering.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4661101001 | TRANSMISSION HOUSING | Main structural case containing gear sets |
| 4661301007 | HOUSING | Intermediate housing for valve body mounting |
| 4661301093 | TUBE | Oil delivery tube for converter lubrication |
| 0631306174 | CYLINDRICAL PIN | Alignment dowel for bell housing positioning |
| 0769123894 | TYPE PLATE | Identification plate with transmission serial number |
| 0750100022 | SCREW PLUG | Seals oil passages in the bell housing |
| 0636302602 | SCREW PLUG | Drain plug for converter bell cavity |
| 0634100633 | O-RING | Seals the bell housing to transmission interface |
| 4661301029 | NOZZLE | Oil spray nozzle for gear cooling |
| 4661301027 | NOZZLE | Secondary oil spray nozzle for clutch pack |
