Vibration in neutral

[gotsmoke?]

Just picked up my first TTA. I have a couple older TA but finally got a TTA. It has 50lb inj, TT chip, hot wire pump, and a aftermarket reg. I knew when I bought it that something was a little funny. The trans has a vibration in park or going down the road. It changes with engine speed not wheel speed. I have clocked the covert to all three positions. It will not lock up going down the road. The car has 47K and the trans was re-built about 1500 miles ago. I don't know the builder. The flexplate is fine and the vibration is not there when then engine runs disconnected from the trans. The scanmaster shows all good. I have check the plugs and wires and have no vaccum leaks. I am starting to look for a new convert. Is there something else that might be missing? Thanks

 

[chris718]

So if you rev the engine in park the vibraion is there?Did you check engine and trans mounts?Exhaust hangers?Does it go away at certain rpm ,or road speed?

 

[gotsmoke?]

Vibration is there at all engine speeds, just varies in pitch. Exhaust looks fine but have not checked motor mounts. It never really goes away, just better/worse.