Overview
The ZF 4168.028.373 CONVERTER Torque Converter Assembly is a complete, direct-replacement unit engineered for the WG 98 Series transmission family. This critical hydraulic component sits between the engine flywheel and the transmission input shaft, functioning as a fluid coupling that multiplies engine torque while dampening driveline vibrations. The SKU 4168.028.373 is a fully assembled torque converter, including the impeller, turbine, stator, and lock-up clutch, ensuring seamless power transfer in heavy-duty industrial applications. When replacing this assembly, it is essential to inspect the 4660101017 TRANSMISSION HOUSING for wear, as misalignment can accelerate converter failure.
Symptoms of Failure
- Torque converter shudder or vibration during lock-up: A worn 4168.028.373 unit often causes noticeable shuddering when the converter clutch engages, especially under load. This is a common long-tail search query for “ZF torque converter shudder fix.”
- Transmission overheating and fluid darkening: Internal stator failure or worn bearings in the converter assembly generate excessive heat, leading to burnt-smelling transmission fluid. Search terms like “ZF transmission overheating torque converter” frequently point to this part.
- Delayed or harsh engagement from neutral to drive: A failing torque converter cannot build hydraulic pressure quickly, resulting in a noticeable lag or clunk when shifting. This symptom is often searched as “ZF WG200 torque converter engagement delay.”
- Oil leaks at the bell housing area: The converter hub seal or pump drive wear can cause fluid to escape, leaving puddles under the vehicle. This is a classic indicator of a failing 4168.028.373 assembly.
Technical Specifications
| Specification | Detail |
|---|---|
| Part Number | 4168.028.373 |
| Assembly Type | Complete Torque Converter (Lock-up Clutch Included) |
| Overall Diameter | ~340 mm (13.4 in) |
| Pilot Diameter | ~45 mm (1.77 in) |
| Weight | ~18.5 kg (40.8 lbs) |
| Housing Material | High-strength cast aluminum alloy |
| Impeller/Turbine Material | Heat-treated steel stampings |
| OEM Reference | ZF 4168.028.373 (Direct OEM) |
| Fluid Capacity | ~2.8 liters (0.74 gal) |
Compatibility
This torque converter assembly is specifically designed for the ZF WG 98 Series, which includes the following transmission models: WG180, WG200, WG210, and WG250. It is also compatible with certain variants of the ZF 4WG-200 and 5WG-200 off-highway transmissions. Always verify the bell housing pattern and pilot bore dimensions against your existing unit. During installation, ensure the 4660301054 HOUSING II is free of cracks, and replace the 0631306174 CYLINDRICAL PIN if damaged, as it aligns the converter to the flywheel. Do not forget to affix a new 0769123894 TYPE PLATE to document the replacement for future service records.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4660101017 | TRANSMISSION HOUSING | Encloses and supports the torque converter and gear train |
| 4660301054 | HOUSING II | Rear housing section that seals the converter cavity |
| 0631306174 | CYLINDRICAL PIN | Alignment dowel for converter-to-flywheel positioning |
| 0769123894 | TYPE PLATE | Identification plate for transmission serial number |
| 0750100022 | SCREW PLUG | Seals fluid passages in the converter circuit |
| 4660221029 | SUCTION TUBE | Draws fluid from the sump to the converter pump |
| 0634100317 | O-RING | Seals the suction tube connection |
| 0636103273 | CAP SCREW | Fastens the converter housing to the bell housing |
| 0634306311 | O-RING | Seals the cap screw bore against fluid leaks |
| 4660321029 | FIXING PLATE | Locks the converter hub to the pump drive gear |
