I just change drum brakes and now the shakes?

did you have the drums turned?, if not that is your problem.|||Warped drums?|||%26quot;The Shakes%26quot; can be caused by a rotational misbalance that can occur during intense centrifugal force; wether it be normal driving or during braking. There are very small weights that can balance out you brake drum, or rotor, and work in unison with your (balanced) wheel to make things run smoothly. The weights are pretty similar to a tire weight and can be found at your local brake shop, i.e. midas, just brakes, or dealership. I would think that professional help and installation would be better than guessing, though. Perhaps it could be a bent drum, or warped pressure plate of some sort. Good luck!