Tom, Only a guess, because it's really impossible to diagnose a car over the Internet, but based on your description, you either have a driveshaft problem or a parking brake problem, or one of your wheels is falling off. best thing to do is put the car up on a lift and check things out. If the vibration and noises are as severe as you describe, then it should be easy to find out what are causing them. Are you SURE that you released the e-brake? I have seen it happen where, if the ebrake does not release fully, it will cause symptoms like you just decribed. As far as your other comments, a 1960 300F is 46 years old, and, even when restored, problems are going to occur. I've had my share with my cars over the years. If you want a totally problem-free vehicle, sell the 300F and buy a new Hemi 300C, or a Lexus ... John Hertog Sag Harbor NY -----Original Message----- From: Chrysler300@xxxxxxxxxxxxxxx [mailto:Chrysler300@xxxxxxxxxxxxxxx] On Behalf Of goldenlion413@xxxxxxx Sent: Sunday, May 28, 2006 8:23 PM To: chrysler300@xxxxxxxxxxxxxxx Subject: [Chrysler300] excessive vibration on 300F car. Hello Would anyone know what would cause excessive vibration on a 300F.It first started when the car reached 55 miles per hour then would go away when the car would reach 60 to 65 miles per hour.Then today i was headed to a car show and was only going 20 miles per hour and the car started to vibrate so excessivly and violently and then i started to hear a winding sound underneath the car that i was forced to turn around and bring the car back home.Deos the driveshaft have counter weights on it or could it be a universal i checked the rear universal and it is fine but the front one with the rubber boot around it seems a little stiff but is still nice and tight so i am confused.God everything is wrong with this car all i can say is whoever restored this car does not have much knowledge on 300 letter cars! i mean for $62,500.00 the car should have been done right the first time and should have been correct.I thank any and everyone for any help tom. [Non-text portions of this message have been removed] To send a message to this group, send an email to: Chrysler300@xxxxxxxxxxxxxxx For list server instructions, go to http://www.chrysler300club.com/yahoolist/inst.htm For archives go to http://www.forwardlook.net/300-archive/ Yahoo! Groups Links ------------------------ Yahoo! Groups Sponsor --------------------~--> Protect your PC from spy ware with award winning anti spy technology. It's free. http://us.click.yahoo.com/97bhrC/LGxNAA/yQLSAA/8LmulB/TM --------------------------------------------------------------------~-> To send a message to this group, send an email to: Chrysler300@xxxxxxxxxxxxxxx For list server instructions, go to http://www.chrysler300club.com/yahoolist/inst.htm For archives go to http://www.forwardlook.net/300-archive/ Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/Chrysler300/ <*> To unsubscribe from this group, send an email to: Chrysler300-unsubscribe@xxxxxxxxxxxxxxx <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/