if i were you i will untight both side of the speed cable from the dashboard and the other end of the cable where it conect to the trainny... and spin the inner cable from either end of the speed cable and see if it twist/spend. if it doest spind/twist smoothly than raplace the whole cable with a new one or an use from from the junk. also check the adapter from the trainny where the end of the speed cable connect to the trainny sometime it just need to be adjust tho. hope it work....
