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LESSON 1: OVERVIEW
Automatic Transmission
6HP26 Transmission
The 2005 Expedition will use the 4R75E automatic transmission like the 2004 and 2005 F-150, while the
Navigator uses the all-new 6HP26 automatic.
The 6HP26 6-speed transmission uses total electronic control for all functions. The Transmission Control Module
(TCM) and the main control valve body units are combined and installed as a single unit inside the automatic
transmission. Hydraulic functions are directed by electronic solenoids to control:
•
engagement feel
•
shift feel
•
shift scheduling
•
modulated Torque Converter Clutch (TCC) applications
•
engine braking
2005 Expedition/Navigator New Model Technician Training 02-SEP-04 1-5