Ok I am about to throw this transmission in the trash, I need some help. I got a tranny from a guy that was missing the top plate that the shifter goes into. It is the same trans as the one already in my truck. I pulled mine and swapped the top plate's (with the shifter plate) into the new trans I got. On the garage floor I was able to get the trans into 1,2,3,4,5 and reverse no problem. I put the trans up right, on the bell housing, and bolted up the dual cases. Now all of a sudden the shifter is stuck in the nuetral position but the trans it self is in reverse! I have tried putting the cases in every gear and also spun the output shaft while trying to put it into/out of gear, no luck. I am about to have a conniption fit! So what do yall suggest to fix it. TIA