Overview
The ZF 4166.335.241 STATOR is a critical hydraulic component engineered for the WG200 series transmission. Positioned between the pump and turbine within the torque converter assembly, this OEM genuine part directs fluid flow to multiply engine torque during low-speed operation. The stator, identifiable by SKU 4166.335.241, features a precision-machined blade geometry that optimizes fluid recirculation, directly improving fuel efficiency and load-handling capacity in heavy-duty industrial applications. This component works in concert with the TRANSMISSION HOUSING to maintain proper hydraulic pressure and thermal stability.
Symptoms of Failure
- Torque converter shudder at low speeds: A worn stator fails to redirect oil flow, causing noticeable vibration during acceleration from a stop.
- Delayed engagement or gear slipping: When the stator loses its one-way clutch capability, hydraulic pressure drops, leading to sluggish shifting and power loss under load.
- Overheating transmission fluid: A seized stator blade restricts fluid circulation, generating excessive heat that degrades oil quality and damages seals.
- Whining noise from the bell housing: Metal-on-metal contact from a failing stator bearing produces a high-pitched sound that intensifies with engine RPM.
Technical Specifications
| Specification | Value |
|---|---|
| OEM Part Number | 4166.335.241 |
| Material | Aluminum alloy with hardened steel hub |
| Outer Diameter | 245 mm (9.65 in) |
| Inner Diameter | 35 mm (1.38 in) |
| Weight | 1.8 kg (3.97 lbs) |
| Blade Count | 27 |
| Operating Temperature Range | -40°C to 150°C |
| OEM Reference | ZF 4166.335.241 |
Compatibility
This stator is primarily designed for the ZF WG200 series, including models WG200, WG180, and WG210. It is also compatible with select ZF Ecomat 4HP and 5HP variants that share the same torque converter architecture. The part integrates directly with the TRANSMISSION HOUSING and requires proper alignment with the TYPE PLATE for correct identification during rebuilds. For secure mounting, the GROOVED STUD must be torqued to factory specifications to prevent fluid bypass.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4644101177 | TRANSMISSION HOUSING | Encloses gear train and torque converter assembly |
| 4644301229 | TRANSMISSION HOUSING | Alternate housing variant for WG200 series |
| 0730365067 | TYPE PLATE | Identification plate for transmission model and specs |
| 0631311009 | GROOVED STUD | Secures stator assembly to pump housing |
| 4644303060 | COVER PLATE | Protects torque converter access opening |
| 4644303061 | COVER PLATE | Alternate cover plate for different housing configurations |
| 0634306525 | O-RING | Seals stator hub to prevent fluid leakage |
| 0636305026 | SCREW PLUG | Closes hydraulic test ports on housing |
| 0501316470 | BREATHER | Vents internal pressure to prevent seal damage |
| 4644301279 | SCREEN SHEET | Filters debris from transmission fluid flow |
