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 www.mercurymarauder.net