Ok, so I was helping a buddy do an auto to manual swap in his car and everything is done. During the process I had to remove the rear housing to install his shift selector because the transmission he got didn't have one in it. After finishing the job and firing the car up (thank god on jack stands still) it's stuck in reverse. Even with the car off you can't get the shifter to go into any other gear. When I took the rear housing back off, of the 3 shift selectors the top one was pushed on and the bottom two still in the middle like neutral. I pulled it back in line with the others and the shaft spins freely. When putting the rear housing back on it keeps knocking that top lever forward? ???? How can I fix this???