not sure what automatic you have but here is how i have done it in the past. find the round cover on the side of the trans. some have a bail clip and others had 3 bolts and i am sure there is more out there. under this cover you will find a set of flyweights kind of like an over grown set like is in a distributer. use safety wire to keep them closed then reinstall the cover. simply remove the wire when your done with it. wire it in two spots, one for each weight. i used to do this weekly when i ran 2 tracks per week.