Strange thing...everytime I floor it on the highway and the RPM exceeds 5500, The whole car starts to vibrate...once the gear changes, it's fine again...any suggestion what to look for?

 

I just had a post about a similar issue. You need to figure out where its coming from and make sure it is not exhaust related first.

If its definately from the engine, check oil level(too much or too little). Other than that, we need you to be more specific about the location of the car that the vibration is coming from. It could be anything.

 

i have same problem good it be low transmission oil ?

regards,

Mike