The CD4E is an Electronically controlled 4 speed automatic transaxle with Torque Converter Lockup. What you are seeing is the shift from 3rd to 4th and then the Torque Converter being applied.
What speed are you doing when this happens ?
Pete...
2004 Mercury Marauder 300A
Black Clearcoat/Dark Charcoal LEATHER
DOB 10/31/2003
DOP 1/2/2004
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