Quote Originally Posted by Grif View Post
Perhaps the TMS=Transmission Mode Switch (aka Neutral Safety Switch according to some part mongers) is term you were looking for?
I assume you're aiming this at the OP, but I'll add that the OEM parts catalog refers to this part as either a Neutral Safety Switch or ASM Switch - Position. Strangely Transmission Mode Switch appears nowhere that I could find. Also, the guys on the Planet seem to refer to this part as a range sensor.

Clear as mud I know.