Overview
The ZF 4166.335.246 STATOR is a precision-engineered hydraulic component designed for the torque converter assembly in heavy-duty WG180 and WG200 series transmissions. This OEM genuine part redirects fluid flow to optimize torque multiplication, directly influencing shift quality and drivetrain efficiency. As a stationary element within the converter housing, the stator (SKU: 4166.335.246) works in concert with the 4644105475: DISCONNECTION and the 4642303097: OUTPUT FLANGE to ensure seamless power transfer. When paired with a secure 0636020211: HEXAGON SCREW and a robust 4644101134: TRANSMISSION HOUSING, this stator maintains proper hydraulic pressure across the entire operating range.
Symptoms of Failure
- Torque converter shudder during acceleration: A worn stator fails to redirect oil correctly, causing noticeable vibration when the vehicle is under load at low speeds.
- Delayed or harsh gear engagement: Degraded stator vanes reduce hydraulic pressure, leading to sluggish shifts between forward and reverse gears.
- Overheating transmission fluid: A seized or slipping stator generates excessive heat, often indicated by a burnt smell or dashboard temperature warnings.
- Loss of power on inclines: When the stator cannot multiply torque effectively, the transmission struggles to maintain speed on grades, triggering “stator clutch failure” diagnostic codes.
Technical Specifications
| Parameter | Value |
|---|---|
| OEM Part Number | 4166.335.246 |
| Material | Aluminum alloy with hardened steel hub insert |
| Outer Diameter | 185 mm (estimated) |
| Inner Diameter (hub) | 45 mm (estimated) |
| Overall Height | 65 mm (estimated) |
| Weight | 1.8 kg (4.0 lbs) |
| Vane Count | 27 (one-way clutch spline) |
| Operating Temperature Range | -40°C to +150°C |
| OEM Reference | ZF 4166.335.246 (Genuine) |
Compatibility
This stator is specifically engineered for ZF WG180 and WG200 series transmissions, commonly found in municipal buses, fire trucks, and heavy construction vehicles. It directly replaces the original stator in WG180-1, WG180-2, WG200-1, and WG200-2 models. Always verify the spline count and hub diameter against your existing unit before installation. For complete transmission rebuilds, consider pairing this stator with the 4644301349: HOUSING and the 0730365125: TYPE PLATE for accurate identification.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4644105475 | DISCONNECTION | Isolates torque converter from driveline during coasting |
| 4642303097 | OUTPUT FLANGE | Connects transmission output shaft to driveshaft |
| 0636020211 | HEXAGON SCREW | Secures stator assembly to pump housing |
| 4644101134 | TRANSMISSION HOUSING | Encloses gear train and torque converter assembly |
| 4644301349 | HOUSING | Intermediate housing for valve body mounting |
| 0730365125 | TYPE PLATE | Identification plate with transmission serial number |
| 0631311009 | GROOVED STUD | Alignment dowel for stator positioning |
| 0636305019 | SCREW PLUG | Seals oil passages in stator support shaft |
| 4644301247 | THREADED BUSH | Wear sleeve for stator shaft bearing surface |
| 0634303485 | O-RING | Hydraulic seal between stator and turbine shaft |
