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Home >> Lincoln >> 2019 >> Nautilus Base, FWD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 19 (Automatic Transmission - 8-Speed Automatic Transmission - 8F57 (1 Of 2)) >> Description And Operation >> Pump Assembly

Pump Assembly

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Fluid Pump and Transmission Fluid Filter Components 

GFD428244Courtesy of FORD MOTOR COMPANY
Item  Description 
1 Transmission fluid filter assembly
2 Pump assembly
3 Chain and sprocket assembly
4 Stator support assembly
5 Transmission case
6 Torque converter housing

Mechanical Operation 

The transmission fluid in the sump area at the bottom of the transmission case flows through a transmission fluid filter to the pump assembly. The pump assembly is bolted to the converter housing and driven by a chain and sprockets. The drive sprocket is turned by the torque converter, the drive chain then transfers the torque from the drive sprocket to the driven sprocket. The driven sprocket is attached to the oil pump shaft.