Will a b18a1 tranny fit on a jdm b16a

heres my prob. i was having a friend install a new clutch in my da because it wasnt catching like it used to and was kinda sloppy.so after removing my tranny he calls me and says my exedy stage 1 clutch is fine.so i tell him something aint right cause when i shift my shit grinds especially in 4th gear.soooooo he calls another mechanic and the mechanic says my tranny has the wrong fluid in it (something 90) and thats the wrong kind and my tranny is fried!!!and know he trying to mount my old b18a1 tranny to my jdm b16a???what should i do im lost!!!

i am running a ls trans with a b16. its not the fastest quarter mile setup, but it works fine.

ok cool cause my mechanic just slapped it on and i didnt want to tell him he had to take it off!!!he wouldnt of liked that!!! ha ha ha !!!

u still got the old trans

i do