The electrical wiring harness and solenoids need to be removed from the old valvebody and installed on the new one. The shift kit in the valvebody with a new separator plate and Viton check balls gives the transmission firmer shifting. Step-by-step, detailed instructions are included with each valvebody. The valvebody installations for the 44RE and 46RE are almost identical, and most other Dodge applications are similar. Ford and GM performance components are also available.