My abs lights on my trans won't shift nor my m.p.h gauge don't work on 1993 GMC Suburban 1500

my transmission won't shift none of my m.p.h. gauges don't work as long as my abs light is on can u tell me what 2 do please.!!!

Asked by for the 1993 GMC Suburban 1500
poss speed sensor,but rec getting diag and est to repair