Overview
The ZF 4166.241.045 STATOR is a critical hydraulic component engineered for the WG65 series of automatic transmissions. Positioned within the torque converter assembly, this OEM genuine part directs fluid flow to multiply engine torque during launch and low-speed operation. The stator’s precise vane geometry ensures optimal stall speed and lock-up efficiency, directly impacting drivetrain responsiveness. The SKU 4166.241.045 is a factory-original ZF replacement, guaranteeing exact fitment and material integrity for rebuilds or overhauls of heavy-duty WG65 units.
Symptoms of Failure
- Torque converter shudder or vibration during acceleration — A worn stator loses its ability to redirect fluid, causing erratic converter lock-up and noticeable driveline shake.
- Delayed or harsh gear engagement — Insufficient stator reaction reduces hydraulic pressure buildup, leading to sluggish shifts from Neutral to Drive or Reverse.
- Overheating transmission fluid — A seized or slipping stator generates excessive heat due to constant fluid turbulence, often triggering warning lights or burnt fluid odor.
- Reduced fuel economy and power loss — When the stator fails to multiply torque, the engine must work harder to move the vehicle, increasing fuel consumption and decreasing pulling capacity.
Technical Specifications
| Part Number | 4166.241.045 |
| OEM Reference | ZF 4166.241.045 |
| Material | Aluminum alloy (die-cast) with hardened steel hub insert |
| Weight | 1.85 kg (4.08 lbs) |
| Outer Diameter | 165 mm |
| Hub Bore Diameter | 28 mm |
| Vane Count | 27 |
Compatibility
This stator is designed specifically for the ZF WG65 series, but it also fits select models in the WG180, WG200, and WG250 families that share the same torque converter architecture. Always verify the transmission serial number and converter housing dimensions before installation. The stator interfaces directly with the TRANSMISSION HOUSING (4616101066) and is secured using HEXAGON SCREW (0636011118) fasteners. During assembly, the stator must be aligned with the HOUSING (4616301307) and HOUSING (4616301309) to ensure proper fluid channeling. For complete rebuilds, we recommend replacing all sealing elements simultaneously.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4616101066 | TRANSMISSION HOUSING | Encloses the gear train and stator assembly |
| 0636011118 | HEXAGON SCREW | Secures stator to the housing |
| 4616301307 | HOUSING | Torque converter cover section |
| 4616301309 | HOUSING | Converter pump housing component |
| 0636011038 | HEXAGON SCREW | Fastener for converter housing |
| 0636016015 | HEXAGON SCREW | Mounting bolt for stator support |
| 0631306085 | CYLINDRICAL PIN | Alignment dowel for stator positioning |
| 0634313118 | O-RING | Seals stator hub to prevent fluid bypass |
| 0636304019 | SCREW PLUG | Closes oil passages in the stator shaft |
| 0634801152 | SEALING RING | Prevents external oil leaks at the stator hub |
Authorized ZF Distributor
We are a certified supplier of genuine ZF components.
