My wife has A EL falcon 06/98 it sometimes gets a bad vibration from the trans seams to be when it's in top if you decelerate or accelerate it goes away a mate recons it may be the lock up clutch any ideas

it could be a number of things, it could be the torque converter or bad uni's

You can try taking it to Top Quality Transmissions in osborne park, see what that can find with it..