1972 Barracuda vibrates when diving

[cmesa]

Hello,
My car seems to vibrate when I drive, I changed the Ujoints and checked my rear axles but still have same problem.
Thank for any help provided.
Chris

[GoodysGotaCuda]

Vibrates all of the time?
At speed?
During braking?
Certain speed?
Certain RPM?


Need some more info..

[Chryco Psycho]

if you put the car in neutral when it is vibrating does it stop , this would eliminate the engine if it does

[cmesa]

Hello, it vibrates at all speeds, and when i put it in neutral it seems to not vibrate at all.
Thank you

[Chryco Psycho]

then it would seem to be an engine issue , so what engine do you have , if it is a cast crank it needs special balancing , if it is a steel crank & has cast crank / offset balanced  parts it will throw it off also

[dfrazz]

Also check the flexplate (if automatic), engine externally balanced = external balanced flexplate (same for internal balanced engine=internal flexplate) and is it tight. 

[JayBee]

Here's yet another scenario I also had with my car once. Vibration while driving and went away when put in neutral. Mine turned out to be the output bearing in the tranny's tailshaft. Not saying this is your problem just relating my similar situation from years ago.