an electronic automatic transmission controller is provided which is adapted to enable electrical control over automatic transmission devices of the type typically used in motor vehicles . the controller employs a manifold having a number of solenoid valve assemblies mounted thereto . the solenoid valve assemblies feature a low stacked height achieved through the configuration of the valves and various improvements in force output for the solenoid valve assemblies . the solenoid valve assemblies are held in an assembled condition through the action of a bracket assembly which has resiliently deflectable arms which bias against the valve assemblies . preferably , non - removable fasteners are employed to affix the bracket to the manifold to prevent unauthorized attempts at servicing . the solenoid valve assemblies have protruding terminals which enable a circuit board to be laid against the solenoid valve assemblies such that the board is soldered along a surface opposite the valve assemblies . the automatic transmission controller further features a design which permits automated assembly , thus reducing costs of fabrication . in addition , various improvements in solenoid design are described including a dual working gap system and a design which enables control over spring biasing of a solenoid armature and air gap distance .