Overview
The ZF 4166.035.134 CONVERTER Torque Converter Assembly is a critical hydraulic component that transfers and multiplies engine torque within the WG 201 series transmission. This complete unit sits between the engine flywheel and the transmission input shaft, using a fluid coupling mechanism to smooth power delivery and provide torque multiplication during low-speed operation. The SKU 4166.035.134 is a direct replacement assembly, engineered to restore original performance in heavy-duty industrial applications. When installed, it works in concert with the 4644101160 TRANSMISSION HOUSING to ensure proper alignment and fluid containment.
Symptoms of Failure
- Torque converter shudder or vibration during acceleration, especially under load, indicating worn clutch friction surfaces or damaged stator bearings.
- Delayed engagement or gear slipping when shifting from neutral to drive, caused by internal seal degradation or lock-up clutch failure.
- Transmission fluid overheating and dark discoloration due to excessive slippage within the converter, often accompanied by a burnt smell.
- Oil leaks near the bell housing from the converter hub seal or pump drive area, leading to low fluid levels and erratic shifting.
Technical Specifications
| Part Number | 4166.035.134 |
| Assembly Type | Complete Torque Converter (with lock-up clutch) |
| Overall Diameter | Approx. 340 mm (13.4 in) |
| Weight | ~18.5 kg (40.8 lbs) |
| Housing Material | High-strength cast aluminum alloy |
| Impeller/Stator Material | Steel with hardened bearing surfaces |
| OEM Reference | ZF 4166.035.134 |
| Fluid Capacity | Approx. 1.2 liters (0.32 gal) |
| Max Input Torque | ~600 Nm (442 lb-ft) |
Compatibility
This torque converter assembly is specifically designed for the ZF WG 201 series transmissions, including models such as WG180, WG200, WG210, and WG211. It is also compatible with select variants of the WG 200 series used in construction and agricultural machinery. For proper installation, ensure the 4644301323 TRANSMISSION HOUSING is in good condition, and verify that the 4644301189 THREADED BUSH and 4475280043 SCREW PLUG are correctly torqued during reassembly.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4644101160 | TRANSMISSION HOUSING | Encloses and supports gear train and converter assembly |
| 4644301323 | TRANSMISSION HOUSING | Alternate housing variant for WG 201 series |
| 4644301189 | THREADED BUSH | Provides threaded mounting point for housing bolts |
| 4475280043 | SCREW PLUG | Seals fluid passages in the transmission housing |
| 0634306198 | O-RING | Prevents fluid leaks at housing and converter interfaces |
| 0730365067 | TYPE PLATE | Identification plate for transmission model and serial number |
| 4644301161 | COVER PLATE | Protects internal components from debris |
| 0636100621 | HEXAGON SCREW | Fastens housing and cover plate assemblies |
| 0631610020 | SET SCREW | Secures threaded bush and alignment components |
| 0501218540 | BREATHER | Equalizes internal pressure and vents moisture |
