I`ve always had a small vibration in the car, and it is evident even in Park or Neutral. My mechanic has tried three different flexplates and two different torque converts in front of the FMX tranny.. and different combinations of flexplates and converters.. WE even have a new harmonic balancer on front of engine. We are scratching out heads now. The engine is not the culprit as it is newly rebuilt and runs very smooth with the tranny removed.

351w 28oz harmonic

So,, any ideas?

LaBelle is online now Report Post

 

a small vibration? Does it get worse with rpm increase?

Its always been there? How long have you had the car?

 

It was a minor vibration in Park or Neutral,, and increased when I got above 55 mph. We have tried several combinations of flexplates and torque converters,, and actually,, its worse now so I know we have a mismatch with running gear. I might just pull everything out south of the engine and install a c4 or aod. Tthe car isn't a racer. Its more for show than go,, but I cant have a vibration in it when I want to cruise.