Hello all, I have had my car for about 2 years but have just now gotten into it. Money is finally catching up! I just put a clutch in my car and now I have a vibration, any ideas? I didnt replace my u-joints in my drive shaft so it is still in phase. Did i miss lining something up? Oh my car is a 88 fc3s vert! God Bless the Rotor!

 

Moving to New Member Technical.
Also, try and get a little info in your title.

Now, as far as your vibration goes:
Put the car in neutral and stopped. Rev the engine up. Is the vibration still there?
Drive the car and look at the speed... Switch your gear, but keep the same speed... Does the vibration change?
Put the car in neutral but let the car coast at speed... Does the vibration change?

 

Sorry I was so vague. I only feel the vibration at about 60 mph and above. it is there with the tranny in gear and neutral. It is also present when the clutch is pressed in. Im pretty sure its in the drive shaft, but cant figure out why.

 

Check the driveshaft for any dents that may have happened when it was out of the car. Also, check the four bolts that secure it to the differential pinion flange.

Are you sure you didn't throw a weight off of the wheels? Try rotating tires or rebalancing all tires.

 

Got it fixed! 2 of the bolts on the flange to the 3rd member loosened up. Such a relief! Thanks for your help!