I just replaced the head and gaskets on my mini, and after setting it back down to drive it out the garage, it goes in gear, feels like clutch engages, but doesnt move. Im so lost right now. It moved fine at first to drive off blocks, then after cleaning up parts, went to move and nothing. Any suggestions?

 

A couple of ideas. No particular order:

A half shaft popped out. Check both sides.

Parking brake frozen (especially if car sat a while). Jack up the rear and make sure the wheels spin.

 

Thanks for the suggestions. Turns out the pass. AxlesAxle joint near the carrier was broken at the bearings, was easy to find out once back up on jackstandS.