Vibration when decelerating.
Need some info guys and girls.
My car, an EL Fairmont 5L V8, has developed a very slight vibration in the past few weeks.
I have a theory.
Now, the vibration is only present under deceleration or VERY light throttle. Dropping the auto back into 3 from D will make it more noticable under deceleration. The car has only done 88,000kms. The vibration has only started since I fitted the Superlows. It is not the zorst.
Here is my theory. It's the universal joints. I'm thinking this because now that I've lowered the car the tailshaft is sitting in a different 'home' position, the uni's at different angles. After 88,000 the rollers and races in the uni's would have wear. Now I've changed their 'home' positions they are using different surfaces in the joints, causing the annoying vibration. If the joints were greasable a few pumps with a gun would probable fix it. Also, the vibration appeared suddenly, not gradually.
Any thoughts welcome.
Does my thinking sound plausable?
I'm not ruling out it could be the harmonic balancer or something else entirely unrelated and the timing of it happening when I lowered the beast being a coincidence.