If the SS fails it usually means a rebuild. The control system has taken a dump. Sometimes the computers are to blame along with the solenoids. Remember that the SS uses electronics and not mechanical selectors. The shifter is actually connected to switches.

One other thing-this gearbox hates neutral drops. It also has some maps to control when and how a gearchange happens. Internally it is very much like a sequential tranny on a bike-it must go thru the gears to get to the one you select.

Happy Luding