intermitent problem iall is well then a lose reverse if i shut down and restart return to normal any ideas?
This was going to be my next suggestion as well. I've seen many new harnesses leak and have had to replace some brand new ones on customers units which didn't make me happy.If you’ve got no codes, check your batteries for condition. My trans was doing some pretty goofy things like not going into gear, flaring every shift, things like that. Never gave me any codes. New batteries fixed my problems. If batteries are good, check your grounds. Someone else might be able to tell you which ones specifically. Also check the plug on the back of the trans for fluid.