the other day i was driving my fc to work and i noticed a small vibration running through the car. today i drove it to work and it felt like the faster i drove the more violant the shaking has become. does anyone have any idea whats going on with my chassis????

 

probably your driveshaft. i didnt find out till i snapped mine of course.

 

If it's speed dependent & not RPM dependent, it could be a wheel bearing.

 

It could be a few things honestly... you are going to have to find out what it is by taking a really close look at a few things such as wheel bearings, wheel balancing, driveshaft, bushings etc. Get the car up in the air and check everything!! Look for loose bolts by tightening everything you can think of.

 

My guess is the belt in your wheel slipped.
Jack the car up and spin each wheel 360* If you find any large bumps, you know the cause.
If you don't find anything, proceed to checking wheel bearings by applying force inward and outward (one hand at top, one hand at bottom.) also try left and right (small shakes left to right, the front wheels will turn if your shaking strokes are too long.) If you still don't notice anything, then your in for a good search.