Can anyone tell me is it neccessary to have the electronic modules that the various and assorted exhaust brake vendors advertise on a truck with an automatic. I read in my latest issue of Trailer Life about the new Banks Brake. According to that article you can buy the basic brake with out the electronic module and it will work fine. I thought I had heard that the module was required in order to use an exhaust brake with an Automatic. I'm confused can anyone help. 
