Overview
The ZF 4166.032.085 CONVERTER Torque Converter Assembly is a critical hydraulic component responsible for transferring engine torque to the transmission input shaft while providing fluid coupling and torque multiplication. Located between the engine flywheel and the transmission pump, this complete unit ensures smooth power delivery and load management in heavy-duty ZF drivelines. The SKU 4166.032.085 is a direct replacement assembly designed for the WG 150 Series and related ZF transmissions, featuring a lock-up clutch mechanism for improved fuel efficiency at highway speeds. This converter assembly works in concert with the TRANSMISSION HOUSING (4642101109) and the TRANSMISSION HOUSING (4642301205) to maintain proper alignment and fluid containment within the gear train.
Symptoms of Failure
- Shuddering or vibration during acceleration — Worn internal clutch friction material or damaged stator bearings cause inconsistent torque multiplication, often felt as a low-frequency shudder between 20-40 mph.
- Delayed or harsh engagement — When the converter fails to lock up properly, operators experience a noticeable lag when shifting from Neutral to Drive or Reverse, accompanied by a sudden jolt.
- Transmission fluid overheating — A failing torque converter generates excessive heat due to internal slippage, leading to burnt-smelling fluid and dashboard temperature warnings.
- Whining or grinding noise from the bell housing — Worn needle bearings or damaged turbine splines produce a metallic whine that increases with engine RPM, indicating imminent converter failure.
Technical Specifications
| Specification | Value |
|---|---|
| Part Number | 4166.032.085 |
| Assembly Type | Complete Torque Converter with Lock-Up Clutch |
| Outer Diameter | 385 mm (15.16 in) |
| Overall Length | 210 mm (8.27 in) |
| Weight | 28.5 kg (62.8 lbs) |
| Housing Material | High-Strength Cast Iron |
| Impeller & Turbine Material | Stamped Steel with Heat-Treated Splines |
| OEM Reference | ZF 4166.032.085 / 4166032085 |
| Fluid Capacity | Approx. 1.8 liters (0.48 gal) |
| Max Input Torque | 1,200 Nm (885 lb-ft) |
Compatibility
This torque converter assembly is primarily engineered for the ZF WG 150 Series transmissions, but its mounting pattern and spline count also make it suitable for select models in the WG 180 and WG 200 series used in construction, agricultural, and material handling equipment. It is commonly found in ZF 4WG-150, 4WG-180, and 4WG-200 gearboxes. For proper installation, ensure the TYPE PLATE (0730365125) is correctly affixed to the housing for model identification, and verify that the GROOVED STUD (0631311009) is torqued to specification to prevent converter walk-out.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4642101109 | TRANSMISSION HOUSING | Encloses and supports gear train components |
| 4642301205 | TRANSMISSION HOUSING | Alternate housing for WG series variants |
| 0730365125 | TYPE PLATE | Identification plate for transmission model |
| 0631311009 | GROOVED STUD | Secures converter to flywheel |
| 4642301168 | SCREEN SHEET | Oil filter screen for transmission sump |
| 4642301169 | SCREEN SHEET | Secondary oil filter screen |
| 0636100621 | HEXAGON SCREW | Fastener for housing and converter mounts |
| 4642301186 | SCREEN SHEET | Fine mesh screen for hydraulic circuit |
| 4644106300 | SHIFT SYSTEM | Controls gear selection and modulation |
| 4644306500 | COVER PLATE | Protects converter access opening |
