I have a d15b2 block and a transmission from d16a6. I got the tranny in place, but it won't go all the way on. There's about a half inch gap, like something's blocking it. Are they compatible or no? What do I do?

 

The trans input shaft is not aligned properly with the clutch disk.

 

That or you just need to rotate the tranny gears a nudge because you're in between splines.

 

Or its possibly just the dowel pins getting a little hung up.

 

What year is the clutch from and what year is the transmission from?

 

listen to this guy, been there and my money on this

 

hope you dont have a 88 tranny the spline count is different. to all other years in ef series. its 88 by itself and 89-91