Here is my problem, I am currently building a 302 to put into my truck. I temporarly mounted the 302 to the c4 so i could mock up the engine mounts (302 has no heads on it right now).

Anyway, when the engine is mounted to the transmission you can not turn it with your hands at all. I cant even get it to turn with a wrench to the crank, it almost feels like the engine is stuck. However, when you pull it off the engine is not stuck.

On the C4, there are two splines that come out, the smaller one can turn freely, the bigger one can't. However, i know this transmission was good when i pulled it off the truck to begin with (it might not have a full amount of transmission fluid in it though).


The one thing i noticed is the torque converter might not be full of oil as well. Not that i cared, i was just mocking up the engine mounts, but my question is..

Why couldn't it turn? Is the torque converter bad?