Tranny and speedometer

[domggg]

I just found another trans from a cx and was wondering if the speedometer readings will change due to the different transmission and speed sensor in the trans.

[GasSavers_Erik]

The trans speed sensor is usually in the final drive section of the trans- so stock tire size differences between the different models would be the best indicator of whether the speedometer would read differently after a trans swap.

[Ford Man]

If the stock tires are different sizes here's a link to a tire size calculator so you can see how much it is going to be off.

http://www.miata.net/garage/tirecalcold.html