Wrong movement after motion link

[kafile]

I have a gear and a shaft which has as built join but works normally (gear spins and shaft stays in place), but after I add a motion link it breaks, and shaft starts to spin while gear stays in place.

[jhackney1950]

You need to attach your model, please do so.  If you do not know how to attach your Fusion 360 model follow these easy steps. Open the model in Fusion 360, select the File menu, then Export and save as a F3D or F3Z file to your hard drive. Then use the Attachments section, of a forum post, to attach it.