i have an 87 na and i just replaced the trans with an 88 trans. the speedo that was on it looked the same but it was cut so i had to use the one already on my car. do they not interchange with each other. will i need to replace it

 

'86-'90 coupe, manual, all the same.
speedometer cable assy, rx7, coupe, manual trans 86-90 $72.55 $52.22