2003 Expedition Start Up Shudder
 

My expedition just started to have a deep sounding vibration/shudder for about 1 second upon start up. Runs fine after that. Seems to only occur in the morning. I am in San Diego if temperature might make a difference. Has anybody had this before?

2003 Ford Expedition
5.4L Eddie Bauer, 4x2
112,000 Miles


Thanks!