Overview
The ZF 4166.035.212 CONVERTER Torque Converter Assembly is a complete, direct-replacement unit engineered for the WG 200 Series transmission family. As the critical hydraulic coupling between the engine and gearbox, this torque converter multiplies engine torque during launch and smoothly transfers power through the drivetrain. The SKU 4166.035.212 represents a fully assembled converter, including the impeller, turbine, stator, and lock-up clutch, ready for installation. It sits directly on the input shaft of the transmission, housed within the bell housing, and is sealed against the TRANSMISSION HOUSING (4644101235) to maintain hydraulic pressure.
Symptoms of Failure
- Shudder or vibration during acceleration: A worn torque converter lock-up clutch or damaged stator vanes causes noticeable shudder when the converter engages, especially at highway speeds.
- Transmission fluid overheating: Internal slippage from a failing converter generates excessive heat, often indicated by a burnt smell or dashboard temperature warnings.
- Delayed or harsh engagement: When the converter fails to build proper hydraulic pressure, you may experience a long pause before the vehicle moves from a stop, followed by a jarring shift.
- Low stall speed or engine stalling: A seized one-way clutch inside the converter prevents proper torque multiplication, causing the engine to stall when coming to a stop.
Technical Specifications
| Specification | Value |
|---|---|
| Part Number | 4166.035.212 |
| Type | Complete Torque Converter Assembly |
| Diameter (nominal) | 340 mm (13.4 in) |
| Weight | 18.5 kg (40.8 lbs) |
| Housing Material | Cast Steel with Friction-Welded Impeller |
| Lock-Up Clutch | Integrated, Hydraulic-Controlled |
| OEM Reference | ZF 4166.035.212 / WG200 Series |
| Fluid Capacity | 1.2 L (0.32 gal) internal |
Compatibility
This torque converter is specifically designed for the ZF WG 200 Series transmissions, including models WG180, WG200, and WG210. It is also compatible with earlier WG 180 variants that share the same bell housing bolt pattern and input spline count. Always verify the spline count and pilot diameter against your existing unit. When replacing the converter, it is recommended to inspect the TRANSMISSION HOUSING (4644301310) for cracks or wear, and to replace the TYPE PLATE (0730365067) if the original is illegible. Additionally, the SHIFT SYSTEM (4644106301) should be checked for proper valve body function after converter installation.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4644101235 | TRANSMISSION HOUSING | Main structural casing that encloses the gear train and converter |
| 4644301310 | TRANSMISSION HOUSING | Alternate housing variant for WG200 series |
| 0730365067 | TYPE PLATE | Identification plate with transmission serial and model data |
| 4644106301 | SHIFT SYSTEM | Hydraulic control unit for gear selection |
| 4644306507 | COVER PLATE | Seals the converter access opening on the housing |
| 4644159302 | SHIFT SYSTEM | Alternate shift system assembly for WG180 models |
| 4644306560 | VALVE BLOCK | Distributes hydraulic fluid to clutches and bands |
| 4644306408 | WASHER | Thrust washer for converter hub alignment |
| 4644306513 | COVER | Dust cover for the converter bell housing |
| 4644306555 | COVER | Secondary access cover for valve body inspection |
