No, the spedometer gear is located on the top back of the transmission and held in place by a tab and a 10mm bolt. You need to remove the bolt, slide the tab out and then slide the spedo gear up and turn it a bit because the splines are at an angle.
This is at least the way it is on a manual '88 CRX and a '91 Integra.
I do not know whether or not they are interchangable between auto and manual though. Hope this helps