Overview
The ZF 4166.035.169 CONVERTER Torque Converter Assembly is a critical hydraulic coupling component positioned between the engine flywheel and the transmission input shaft within the WG 200 Series gearbox. This complete unit transfers and multiplies engine torque through fluid dynamics, enabling smooth power delivery and load handling in heavy-duty industrial applications. The SKU 4166.035.169 is a direct replacement assembly designed to restore original ZF performance characteristics, ensuring efficient power transmission and reducing drivetrain stress during low-speed operations.
Symptoms of Failure
- Torque converter shudder or vibration during acceleration — Worn internal clutch friction surfaces or degraded lock-up dampers cause noticeable shuddering when the converter engages, particularly under moderate to heavy load conditions.
- Transmission fluid overheating and discoloration — A failing torque converter generates excessive heat due to internal slippage, leading to burnt-smelling, dark fluid and potential damage to downstream components like the TRANSMISSION HOUSING (4644101176).
- Delayed or harsh engagement when shifting from Neutral to Drive — Reduced hydraulic pressure within the converter assembly results in sluggish engagement or abrupt clunking noises as the transmission attempts to couple the engine to the drivetrain.
- Audible whining or grinding noises from the bell housing area — Worn bearings or damaged turbine splines produce metallic sounds that intensify with engine RPM, often indicating imminent failure of the converter unit.
Technical Specifications
| Specification | Value |
|---|---|
| Part Number | 4166.035.169 |
| Assembly Type | Complete Torque Converter Unit |
| Outer Diameter | Approx. 340 mm |
| Overall Length | Approx. 180 mm |
| Weight | ~18.5 kg |
| Primary Material | High-strength cast aluminum housing with hardened steel turbine and stator |
| OEM Reference | ZF 4166.035.169 |
| Torque Capacity | Up to 1,200 Nm (estimated) |
| Fluid Type | ZF-approved ATF or equivalent |
Compatibility
This torque converter assembly is specifically engineered for the ZF WG 200 Series transmissions, including models such as WG180, WG200, and WG210. It is also compatible with certain variants of the WG 150 series when used with the appropriate TRANSMISSION HOUSING (4644301371). For proper identification, always verify the TYPE PLATE (0730365067) on your transmission to confirm model and serial number compatibility. The unit mounts using a GROOVED STUD (0631311009) for secure alignment within the bell housing assembly.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4644101176 | TRANSMISSION HOUSING | Encloses and supports gear train and torque converter assembly |
| 4644301371 | TRANSMISSION HOUSING | Alternative housing variant for specific WG series configurations |
| 0730365067 | TYPE PLATE | Identification plate with transmission model and serial number |
| 0631311009 | GROOVED STUD | Alignment stud for torque converter mounting |
| 4644303060 | COVER PLATE | Seals the converter access opening on the housing |
| 4644201011 | COVER PLATE | Protective cover for transmission inspection port |
| 4644201010 | COVER PLATE | Lower cover plate for fluid pan area |
| 4644301372 | COVER PLATE | Rear housing cover plate for WG series transmissions |
| 0636610028 | STUD | Mounting stud for transmission-to-engine connection |
| 0634306525 | O-RING | Seals fluid passages between converter and housing |
