Overview
The ZF 4166.034.022 CONVERTER Torque Converter Assembly is a critical hydraulic coupling component that transfers engine torque to the transmission input shaft in ZF WG 180 and WG 200 series powershift transmissions. As a complete unit, this torque converter assembly modulates power delivery through fluid coupling, enabling smooth vehicle acceleration and load handling in heavy-duty industrial applications. The SKU 4166.034.022 replaces worn or failed converters to restore driveline efficiency and prevent cascading damage to adjacent components such as the 4644101131 TRANSMISSION HOUSING and the 4644301228 TRANSMISSION HOUSING.
Symptoms of Failure
- Torque converter shudder or vibration during low-speed operation: Worn internal clutch plates or damaged stator bearings cause irregular fluid flow, leading to noticeable shudder when accelerating from a stop or under heavy load.
- Transmission fluid overheating and dark discoloration: A failing converter generates excessive heat due to internal slippage, often accompanied by burnt-smelling transmission fluid that indicates degraded hydraulic performance.
- Delayed or harsh engagement when shifting gears: Reduced converter lockup efficiency results in sluggish gear changes or abrupt engagement, particularly in ZF WG 180 and WG 200 series transmissions.
- Visible fluid leaks near the bell housing area: Worn seals or cracks in the converter housing allow transmission fluid to escape, leaving puddles under the vehicle and risking low fluid levels.
Technical Specifications
| Specification | Value |
|---|---|
| Part Number | 4166.034.022 |
| Product Type | Torque Converter Assembly (Complete Unit) |
| Outer Diameter | ~340 mm (estimated) |
| Overall Height | ~180 mm (estimated) |
| Weight | ~22 kg (48.5 lbs) |
| Primary Material | Cast steel housing with hardened turbine and stator |
| OEM Reference | ZF 4166.034.022 |
| Fluid Capacity | ~3.5 liters (estimated) |
Compatibility
This torque converter assembly is engineered for ZF WG 180 Series and ZF WG 200 Series powershift transmissions commonly used in construction, mining, and agricultural machinery. It directly replaces the original converter in models such as WG180, WG200, and their variants (e.g., WG180-2, WG200-4). For proper installation, ensure the transmission housing is in good condition—consider replacing the 0730365067 TYPE PLATE to verify correct model identification, and inspect the 0631311009 GROOVED STUD for secure mounting. Always pair this converter with fresh seals and gaskets to prevent leaks.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4644101131 | TRANSMISSION HOUSING | Encloses and supports transmission gears and shafts |
| 4644301228 | TRANSMISSION HOUSING | Alternate housing variant for WG series transmissions |
| 0730365067 | TYPE PLATE | Identification plate for transmission model and serial number |
| 0631311009 | GROOVED STUD | Secures torque converter to flexplate or flywheel |
| 4644301298 | COVER PLATE | Protects converter access opening on housing |
| 0634306525 | O-RING | Seals converter-to-housing fluid connection |
| 0636305026 | SCREW PLUG | Closes fluid drain or test ports |
| 4475280078 | ADAPTER | Adapts converter to different engine flywheel patterns |
| 0501316470 | BREATHER | Vents transmission pressure to prevent contamination |
| 4644301279 | SCREEN SHEET | Filters debris from transmission fluid circuit |
