the tranny is simple, i had a d15b7 engine. took no more than 1 hr to take it out, this being my first time. pretty much disconnect the bolts connecting the tranyn to teh engine, the sensors, the 2 mounts and it slides out. Internals however, i did not bother messing with. I did however attempt to open my friends transmission out of a 4g63 engine. its not complicated but there are alot of little rods, springs, synchros, just to open teh casing.