How do I remove this piece on the transmission shaft? Looks like it's on a taper. Puller?
There is a thread on the inside of it.There is usually an internal thread in the hub that you can screw a proper puller into to remove them. If not you may have to get creative with some other sort of puller or even resort to wedges and a brass drift...if you do, be careful to block behind the primary case to avoid cracking it.