Brake problem

ok here is my problem. About 3 months ago I took my truck in for safety inspection. All was good except the mechanic said that I needed new drums. Ok so I bought new drums at UAP and installed them and adjusted the star wheel so the E brake worked great when applied. After a few weeks when I went to brake I had a shake while braking. Sometimes pretty bad and sometimes just a bit.
I thought that maybe my front rotors were warping so I just changed the rotors and pads in the front this weekend.
Took it for a test drive and I have much better braking but the shake is still there.
Is this because I did not change the shoes when I changed the drums? Or did the drums somehow warp ?
Could someone please help me diagnose the problem?
I have a 2002 Toyota Tacoma 4x4 3.4 Double Cab Automatic
Thanks

 

You can pull the e brake on a safe road and see if the shaking happens to figure out if the shaking is front the front or rear brakes. I would have replaced the shoes with the drums since the drums are kind of like the rotor and most people would replace brake pads when replacing rotors.

Oh and

http://www.stoptech.com/technical-support/technical-white-papers/-warped-brake-disc-and-other-myths

 

Perfect! Thank you I did not think of that, but yes makes sense now that you suggested that. Thank you!