Overview
The ZF 4168.028.190 CONVERTER Torque Converter Assembly is a critical hydraulic component that transfers engine torque to the transmission via fluid coupling, while multiplying torque during low-speed operation. Positioned between the engine flywheel and the transmission input shaft, this complete unit ensures smooth power delivery and load absorption in heavy-duty industrial drivetrains. The SKU 4168.028.190 is engineered specifically for the WG 100 Series, providing a direct replacement for worn or failed assemblies. This converter integrates seamlessly with the 4651101009: TRANSMISSION HOUSING and the 4651301025: HOUSING to maintain structural integrity and fluid containment.
Symptoms of Failure
- Torque converter shudder or vibration during acceleration — Worn internal clutch plates or damaged stator vanes cause irregular fluid flow, leading to noticeable shaking under load.
- Transmission fluid overheating and discoloration — A failing converter generates excessive friction, raising operating temperatures and turning fluid dark or burnt-smelling.
- Delayed or harsh engagement when shifting from neutral to drive — Internal seal degradation or impeller wear reduces hydraulic pressure, causing sluggish response or abrupt gear engagement.
- Whining or grinding noise from the bell housing area — Bearing failure or turbine damage produces metallic sounds, especially at idle or low RPM.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number | 4168.028.190 |
| Assembly Type | Complete Torque Converter Unit |
| Outer Diameter | ~340 mm (estimated) |
| Overall Length | ~180 mm (estimated) |
| Weight | ~22 kg (48.5 lbs) |
| Primary Material | Cast steel housing with hardened steel clutch plates |
| OEM Reference | ZF 4168.028.190 |
| Series Compatibility | WG 100 Series |
Compatibility
This torque converter assembly is designed for ZF WG 100 Series transmissions, including models such as WG180, WG200, and WG210. It is also compatible with select WG 120 and WG 150 variants that share the same bell housing bolt pattern and input shaft spline count. Always verify your transmission model and serial number before installation. For proper sealing, pair this unit with a new 0634303928: O-RING and ensure the 4651301031: HOUSING is free of cracks or warping.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4651101009 | TRANSMISSION HOUSING | Encloses and supports the torque converter and gear train |
| 4651301025 | HOUSING | Rear housing section for fluid routing and bearing support |
| 0634303928 | O-RING | Seals the converter-to-housing interface to prevent fluid leaks |
| 4651301031 | HOUSING | Intermediate housing component for converter alignment |
| 4651203002 | SCREEN SHEET | Filters debris from transmission fluid before entering the converter |
| 4651303005 | SCREEN SHEET | Secondary filtration screen for high-pressure oil circuits |
| 0636101032 | CAP SCREW | Secures housing flanges and converter cover plates |
| 0630361028 | SEALING CAP | Closes unused ports to maintain hydraulic pressure |
| 4475280060 | SCREW PLUG | Threaded plug for drain or test points |
| 0634303312 | O-RING | Seals the screw plug and cap screw interfaces |
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