I decided to give it a shot. The only hard part was locating a switched 12V source. There are no extra outlets on the factory fuse box,which is a little strange. I located the box in an area under the radio,in the console area,plenty of room and the wire reaches the tailshaft speed sensor. Got it all hooked up,set the 12 dip switches,and took it for a test. The ratio selection I picked proved to be dead on. At an indicated 70 MPH,the engine is running at 2300 RPM in 5th gear.I also double checked it with the highway mile markers.