Uflex USA A Electronic Shift Unit Power. These Boating & Marine from Uflex USA are designed to be used with direct connection to the electrical shift unit on the transmission. The Uflex USA Shift Unit w/ Built In Diagnostics ties into the port side of the transmission and acts as a relay controlling the movement of the shift cylinders. This is a must have device for those who want to diagnose their own transmissions. There is even a self diagnostics feature in the control panel of some models. For a reliable and rugged way to shift your transmission into park or neutral this Uflex USA Power A Electronic Shift Control Unit is a great option. Specifications for Uflex USA Power A Electronic Shift Unit: Manufacturer: Uflex USA Color: Black Package Contents: Uflex USA Power A Electronic Shift Unit Uflex USA 42023A: A Electronic Shift Unit Power