Front end vibration.... but it goes away when warm????

[tommygunz12]

So I have a 2006 gp gt. In the mornings when the car is cold and i get on the freeway i feel and hear a bad vibration. the whole car shakes and gets worse the faster I go. The vibration starts to quiet down as the engine temp goes up (not sure if that iscorrelated). within in about 5 minutes at speed the vibration is gone. Where should I start?

Also im not sure if this normal but, the car keeps the rpms up until the motor starts to register a temp on the gauge on the dash. The vibration also gets a little better after this happens but is still prevalent.

thanks in advance for the help.

[Scottydoggs]

it could be flat spots in the tires from sitting over night, gets worse in the winter time with the cold. it always stops after a few miles.

the rpm deal, the car wont take over drive till its so hot. once it warms up, it enters o/d. can also take a few miles.

[HighOctaneRacing]

My new tires do this cause they are performance all seasons. Summer time they are awesome but winter time kinda sucks the first few miles lol

[tommygunz12]

thanks for the help!