Hello gentlemen and gentlewomen!

This is my first post so I apologize if I do/say something wrong.

Ok so my 1993 Honda Accord speedometer stopped working. I replaced the speed sensor and little pin, but still doing the same thing. I noticed the odometer seems to be working though, which tells me it's not the speed sensor (unless odometer uses a different sensor but I doubt it?). I used my Google map and when I was traveling at approximately 80 km/h the odometer was getting 1 km in less than 60 seconds but the speedometer said I was only traveling at 40 km/h.

I'm kind of stuck on what to check from here, any help would be greatly appreciated!

Cheers