speed sensor???

[got_boost702]

I have a 95 240sx with a s13 redtop and the speedo doesnt work and i believe it is the speed sensor so if I just go to the nissan dealership and order a speed sensor for a 95 240 will it work even though i have an SR20? Im still using the stock gauge cluster by the way. I know it may sound like a simple question but just dont want to spend $100 on the wrong thing and i did use the search button.

Thx

[extheflow]

make absolutely sure that it's not a leftover wiring gremlin from the swap before you start buying replacement parts. recheck alll your connections.