Overview
The ZF 4166.034.068 CONVERTER Torque Converter Assembly is a critical hydraulic coupling component located between the engine and the transmission gearset in the WG 200 Series. This complete unit transfers and multiplies engine torque through fluid dynamics, enabling smooth power delivery and load management in heavy-duty industrial applications. The SKU 4166.034.068 is engineered as a direct replacement assembly, ensuring precise fitment and OEM-level performance within the ZF drivetrain system.
Symptoms of Failure
- Torque converter shudder or vibration during low-speed acceleration, often caused by worn lock-up clutch friction material.
- Transmission fluid overheating and darkening, indicating internal stator or turbine damage within the converter unit.
- Delayed or harsh gear engagement when shifting from neutral to drive, resulting from degraded converter impeller vanes.
- Audible whining or grinding noises from the bell housing area, signaling bearing failure or impeller-to-turbine contact.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number | 4166.034.068 |
| Assembly Type | Complete Torque Converter Unit |
| Outer Diameter | 340 mm (estimated) |
| Overall Length | 180 mm (estimated) |
| Weight | 22.5 kg (49.6 lbs) |
| Housing Material | High-strength cast iron |
| Impeller Material | Heat-treated steel |
| OEM Reference | ZF 4166.034.068 |
| Seal Type | Viton O-ring (compatible with 0634306198: O-RING) |
Compatibility
This torque converter assembly is primarily designed for the ZF WG 200 Series transmissions, including models WG180, WG200, and WG210. It also fits select WG 180 Series variants used in construction equipment, agricultural machinery, and material handling vehicles. Always verify the transmission serial number and bell housing pattern before installation. The converter interfaces directly with the 4644105423: DISCONNECTION mechanism and the 4644303054: OUTPUT FLANGE assembly. Secure mounting requires the 0636021010: HEXAGON SCREW kit, while the 4644101232: TRANSMISSION HOUSING provides the structural enclosure for the entire unit.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4644105423 | DISCONNECTION | Clutch disconnection mechanism for torque converter lock-up |
| 4644303054 | OUTPUT FLANGE | Driveshaft connection flange at transmission output |
| 0636021010 | HEXAGON SCREW | Fastener for converter-to-flexplate mounting |
| 4644101232 | TRANSMISSION HOUSING | Main structural housing for gear and converter assembly |
| 4644301282 | TRANSMISSION HOUSING | Alternate housing variant for WG 200 series |
| 4475280043 | SCREW PLUG | Sealing plug for converter drain port |
| 0634306198 | O-RING | Hydraulic seal between converter and pump |
| 0730365067 | TYPE PLATE | Identification plate for converter specifications |
| 4644301298 | COVER PLATE | Protective cover over converter access opening |
| 4644106300 | SHIFT SYSTEM | Hydraulic shift control valve assembly |
