my trans command was a p.o.s. it would shift into o/d come out and go right back in.we unhooked it for about 400 miles ,no problem. hooked it back up and 1 mile, only 1 mile it started again. sent it back, they tested it. said nothin was wrong. put back in and got the same thing. so its bolted to the truck w/ the bypass plug in doin nothin.