Overview
The ZF 4166.030.168 CONVERTER Torque Converter Assembly is a critical hydraulic coupling component that transfers engine torque to the transmission input shaft within the WG 200 Series. This complete unit replaces worn or failed converters, ensuring smooth power delivery and preventing drivetrain damage. The SKU 4166.030.168 is engineered to OEM specifications, featuring a precision-machined stator and turbine assembly that maintains proper fluid coupling under heavy loads. Located between the engine flywheel and the transmission pump, this converter assembly directly influences shift quality and overall transmission efficiency.
Symptoms of Failure
- Torque converter shudder or vibration during acceleration – A worn 4166.030.168 unit often causes noticeable shaking, especially when climbing grades or towing heavy loads.
- Transmission overheating and fluid discoloration – Internal wear generates excessive heat, leading to burnt-smelling, dark transmission fluid and potential seal damage.
- Delayed or harsh gear engagement – A failing converter fails to lock up properly, resulting in sluggish takeoffs or abrupt shifts between forward and reverse.
- Low stall speed or stalling at idle – Worn internal clutches or damaged vanes prevent the converter from maintaining adequate hydraulic pressure, causing the engine to stall when stopped.
Technical Specifications
| Part Number | 4166.030.168 |
| Type | Complete Torque Converter Assembly |
| Dimensions (Diameter x Length) | 340 mm x 180 mm (approx.) |
| Material | High-strength steel housing with aluminum turbine and stator |
| Weight | 22.5 kg (49.6 lbs) |
| OEM Reference | ZF 4166.030.168 |
| Fluid Capacity | 1.8 liters (approx.) |
Compatibility
This converter assembly is primarily designed for ZF WG 200 Series transmissions, including models WG180, WG200, and WG210. It also fits select variants of the ZF 4WG-200 and 5WG-200 off-highway transmissions used in construction equipment, agricultural tractors, and material handlers. Always verify the bell housing pattern and input shaft spline count before installation. For proper sealing, pair this unit with a new 0634306323 O-RING and inspect the 4644301298 COVER PLATE for wear. The 4644101249 TRANSMISSION HOUSING and 4644301402 TRANSMISSION HOUSING must be free of cracks to ensure correct alignment.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4644101249 | TRANSMISSION HOUSING | Encloses and supports gear train and converter assembly |
| 4644301402 | TRANSMISSION HOUSING | Alternative housing variant for WG200 series |
| 4644301298 | COVER PLATE | Seals converter access opening; prevents fluid leaks |
| 0634306323 | O-RING | Provides hydraulic seal between converter and housing |
| 0636305026 | SCREW PLUG | Seals drain or fill ports in transmission housing |
| 4644301279 | SCREEN SHEET | Filters debris from transmission fluid flow |
| 4644301088 | SEALING CAP | Protects unused ports from contamination |
| 4644109044 | PARKING BRAKE | Mechanical brake for stationary holding |
| 0501211070 | BRAKE | Friction brake component for clutch packs |
| 0501317036 | PISTON | Hydraulic actuator for clutch engagement |
