Overview
The ZF 4168.030.115 CONVERTER Torque Converter Assembly is a critical hydraulic component responsible for transferring engine torque to the transmission input shaft within the WG 150 Series gearbox. As a complete unit, this SKU (4168.030.115) integrates the impeller, turbine, and stator assembly to multiply torque during low-speed operation and provide smooth lock-up at cruising speeds. Positioned between the engine flywheel and the transmission pump, this converter ensures efficient power delivery while dampening torsional vibrations. For a full rebuild, technicians often pair this converter with a replacement 4642101047: TRANSMISSION HOUSING to maintain structural integrity.
Symptoms of Failure
- Torque converter shudder or vibration – A noticeable shudder during light acceleration or at highway speeds indicates worn clutch friction material inside the unit.
- Transmission overheating and fluid discoloration – A failing stator or locked-up one-way clutch causes excessive heat generation, turning the ATF fluid dark or burnt-smelling.
- Delayed or harsh engagement – When the converter fails to build hydraulic pressure properly, you may experience a pronounced lag when shifting from Park to Drive or Reverse.
- Whining or grinding noise from the bell housing – Worn bearings or damaged turbine fins produce a metallic whine that increases with engine RPM, often mistaken for pump failure.
Technical Specifications
| Parameter | Specification |
|---|---|
| Part Number | 4168.030.115 |
| Assembly Type | Complete Torque Converter (Lock-up capable) |
| Overall Diameter | ~340 mm (13.4 in) |
| Pilot Diameter | ~45 mm |
| Mounting Bolt Pattern | 6-bolt flexplate (M10x1.5) |
| Weight | ~18.5 kg (40.8 lbs) |
| Housing Material | Cast steel with hardened stator splines |
| OEM Reference | ZF 4168.030.115 / WG150 |
Compatibility
This torque converter assembly is engineered specifically for the ZF WG 150 Series transmission family. It is directly compatible with the following models: WG150, WG180, and WG200 gearboxes used in heavy-duty construction equipment, agricultural tractors, and industrial material handlers. When installing this unit, ensure the transmission housing is free of cracks or warpage. We recommend inspecting the 4642301207: TRANSMISSION HOUSING for wear, and replacing the 0730365067: TYPE PLATE to maintain accurate identification tags. Additionally, secure the converter using a new 0631311009: GROOVED STUD for proper alignment.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4642101047 | TRANSMISSION HOUSING | Main structural casing for the gearbox |
| 4642301207 | TRANSMISSION HOUSING | Alternate housing variant for WG150 |
| 0730365067 | TYPE PLATE | Identification tag for transmission model |
| 0631311009 | GROOVED STUD | Alignment dowel for converter mounting |
| 4642301168 | SCREEN SHEET | Filter mesh for oil pump intake |
| 4642301169 | SCREEN SHEET | Fine mesh filter for hydraulic circuit |
| 0636100621 | HEXAGON SCREW | Fastener for housing assembly |
| 4642301186 | SCREEN SHEET | Secondary filter element |
| 4644106319 | SHIFT SYSTEM | Valve body control assembly |
| 4644159356 | SHIFT SYSTEM | Modulator shift control unit |
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