Overview
The ZF 4166.030.044 CONVERTER Torque Converter Assembly is a critical hydraulic coupling unit designed for the WG 200 Series transmissions. This complete assembly transfers engine torque to the transmission input shaft while multiplying power during low-speed operation, ensuring smooth vehicle launch and efficient load handling. The SKU 4166.030.044 replaces worn or damaged converters that cause drivability issues, restoring full lock-up clutch function and fluid flow. It integrates directly with the TRANSMISSION HOUSING and the HOUSING to form the sealed torque converter circuit.
Symptoms of Failure
- Shuddering or vibration during acceleration: A failing torque converter often produces a noticeable shudder when the vehicle accelerates from a stop, especially under load. This indicates worn clutch friction material or damaged turbine blades.
- Delayed or harsh gear engagement: When the converter fails to lock up properly, you may experience a significant delay when shifting from neutral to drive or reverse, followed by a harsh engagement.
- Transmission fluid overheating: A slipping torque converter generates excessive heat, causing the transmission fluid to darken and burn. This often triggers warning lights or fluid leaks around the TYPE PLATE area.
- Whining or grinding noise from the bell housing: Worn bearings or damaged stator components produce a high-pitched whine that changes with engine RPM, indicating internal converter failure.
Technical Specifications
| Specification | Value |
|---|---|
| Part Number | 4166.030.044 |
| Assembly Type | Complete Torque Converter Unit |
| Outer Diameter | ~340 mm (13.4 in) |
| Overall Length | ~180 mm (7.1 in) |
| Weight | ~18.5 kg (40.8 lbs) |
| Primary Material | Steel housing with aluminum turbine |
| Lock-Up Clutch | Integrated friction disc |
| OEM Reference | ZF 4166.030.044 |
| Mounting Hardware | Includes GROOVED STUD set |
Compatibility
This torque converter assembly is engineered for ZF WG 200 Series transmissions, including models WG180, WG200, and WG210. It is also compatible with select WG 180 Series units that share the same bell housing pattern and input shaft spline count. Always verify the pilot diameter and flexplate bolt pattern before installation. The converter mates directly to the TRANSMISSION HOUSING and the HOUSING assembly, while the TYPE PLATE confirms the exact series variant. For secure mounting, the GROOVED STUD is used to align the converter to the flexplate.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4644101144 | TRANSMISSION HOUSING | Encloses gear train and converter |
| 4644301304 | HOUSING | Rear support structure for output shaft |
| 0730365067 | TYPE PLATE | Identification tag for transmission series |
| 0631311009 | GROOVED STUD | Converter-to-flexplate alignment fastener |
| 4644106300 | SHIFT SYSTEM | Controls gear selection and pressure |
| 4644306500 | COVER PLATE | Seals converter access opening |
| 4644159300 | SHIFT SYSTEM | Secondary shift control assembly |
| 4644306560 | VALVE BLOCK | Hydraulic pressure distribution manifold |
| 4644306408 | WASHER | Thrust washer for converter hub |
| 4644107006 | SPEEDOMETER | Output speed sensor drive gear |
