E40D 4R100 Automatic Transmission Oil Pump RF-F81P-7B324-AA
The **automatic transmission oil pump** is the hydraulic heart of the system:
1. **Pressure Generation** – Creates flow for clutch engagement and shift control.
2. **Lubrication** – Delivers ATF to bearings/gears to prevent wear.
3. **Cooling** – Circulates fluid to manage transmission temperatures.
4. **Torque Converter Feed** – Supplies fluid for power transfer and lockup clutch operation.
Failure = loss of pressure → no shifts → transmission death!




RF-F81P-7B324-AA Oil Pump
,E40D Oil Pump
,E40D 4R100 Automatic Transmission Oil Pump
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Second Generation 018CHA CVT Transmission Valve Body Assembly - Enhanced Hydraulic Control Module
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