Overview
The ZF 4168.030.107 CONVERTER Torque Converter Assembly is a complete, direct-replacement unit engineered for the demanding power transfer requirements of ZF WG 180 and WG 200 series transmissions. This precision-machined component sits between the engine flywheel and the transmission input shaft, converting rotational torque into hydraulic energy to enable smooth, modulated gear engagement. As a fully assembled unit, the SKU 4168.030.107 eliminates the need for partial rebuilds, offering a drop-in solution that restores original driveline efficiency. When installed, it works in concert with the TRANSMISSION HOUSING and the HOUSING to maintain proper alignment and fluid containment within the torque path.
Symptoms of Failure
- Shuddering or vibration during acceleration: A worn torque converter often produces a noticeable shudder when the lock-up clutch engages, especially under moderate throttle. This symptom is frequently searched as “ZF torque converter shudder fix.”
- Delayed or harsh gear engagement: When the converter fails to build adequate hydraulic pressure, operators experience a pronounced lag between shifting from neutral to drive, often described as “transmission slipping when cold.”
- Overheating transmission fluid: A failing converter generates excessive heat due to internal stator clutch slippage, leading to burnt-smelling fluid and dashboard temperature warnings. This is a common “torque converter overheating” complaint in heavy-duty applications.
- Visible oil leaks near the bell housing: Seal degradation around the converter hub causes fluid to weep from the front of the transmission, a condition often searched as “ZF transmission front seal leak.”
Technical Specifications
| Part Number | 4168.030.107 |
| Unit Type | Complete Torque Converter Assembly |
| Overall Diameter | 340 mm (13.4 in) |
| Overall Length | 195 mm (7.7 in) |
| Weight | 14.5 kg (32.0 lbs) |
| Primary Material | Cast Aluminum Housing with Steel Turbine Hub |
| OEM Reference | ZF 4168.030.107 |
| Stator Type | Sprag Clutch with Roller Bearings |
| Fluid Capacity | 1.2 L (0.32 gal) internal |
Compatibility
This torque converter assembly is specifically designed for ZF WG 180 Series and ZF WG 200 Series transmissions. It is a direct fit for models including the WG180, WG180A, WG200, and WG200A, commonly found in industrial forklifts, reach stackers, and heavy-duty material handling equipment. The unit interfaces directly with the TYPE PLATE for identification and is secured using the GROOVED STUD to ensure proper mounting torque retention. Always verify your transmission serial number against the WG series designation before ordering.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4644101142 | TRANSMISSION HOUSING | Encloses gear train and torque converter assembly |
| 4644301301 | HOUSING | Supports converter stator and pump assembly |
| 0730365067 | TYPE PLATE | Identification plate for transmission model verification |
| 0631311009 | GROOVED STUD | Secures converter housing to flywheel adapter |
| 4644303060 | COVER PLATE | Seals converter access opening |
| 4644303061 | COVER PLATE | Alternate cover plate for different housing variants |
| 4475280078 | ADAPTER | Connects converter to engine flywheel |
| 4644106306 | SHIFT SYSTEM | Controls hydraulic pressure to converter lock-up |
| 4644306499 | COVER PLATE | Protects converter drain plug area |
| 4644159351 | SHIFT SYSTEM | Modulates converter clutch engagement |
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