Darnold2001
New Member
I have an 07 expedition with a driveline vibration. It's not bad,but noticeable. I've replaced the u joints, support bearing for driveshaft ,chaged fluid in the rear diff and replaced the differential support brace . I'm really scratching my head on this . Transmission shifts fine,no play in output shaft of the transmission, rear seal in transmission is good. I did notice the transmission coupler ( i think that's what it is called) a round thick rubber piece has a lot of cracking in it. Could that be my problem??
