starter keeps spinning

Just did a complete replacement of my engine and trans (and most of the other parts too). I replaced the starter too and Now my starter won’t engage and just spins . Any ideas anyone ?

Hi all I have an issue with my starter in my 1998 Pontiac Sunfire GT, 2.4l engine, with 5 speed manual transmission. So this issue never used to be a problem but it has been happening more and more and seems to be almost every time I go to start the car. When I go to start the car I can hear...