So I took out my transmission and drive shaft about a year ago in order to upgrade to an NV4500 and then life got in the way (baby and all that that incurs

).
Anyway, we are moving at the end of the month and I just put the original transmission back in to button everything up. Problem is is that it feels as if the clutch is engaged, even in neutral.
I used the old clutch disc and pressure plate as the truck shifted great before I took it apart. I got a new throw-out bearing because I left the old one out and it got ugly.
I can see the linkage "bucking" when I try to start the truck and see the transmission rotate even though I am in neutral. What could cause this issue? Any help would be greatly appreciated. Thank you.