I have a square, 4 conductor plug (only 3 wires) that, according to my schematic, should go to a switch on the auto trans. It seems to let the ECM know when the tranny is in 3rd and 4th gear (also has temp dependencies). Needless to say, there is no place for this in my TH400. Does it matter? Should I hard wire it in some way to fool the ECM? TIA. Russ 85 K30 CUCV, 350 TBI, TH400, 205, D60/C14, 4.56 Locked Some day: 4" lift, 44" tires, massive cutting, shorter wb and rear overhang.