TT 5.7 chip / gear reading?

turbocamino1

turboholic
Jul 7, 2007
307
14
18
My 87 Camino had nearly everything from a T type from the dash forward swapped over...one thing that wasnt was the shifter ..my set-up has no N/saftey sw. system at all.. i think i had read that the safety sw. was involved in chip knowing which gear car is in? If i am wrong..still I am wondering if or how my chip/ecm knows what gear i am in?