Hello to all fellow mustang owners and fanatics. I am new to this forum, and I have a question about my 66 GT Stang. I recently cracked my bellhousing on my old C4 tranny. I was able to find a used, but working condition C4 transmission. I put it on and fired her up and a I came across a high pitched rattle right under the bellhousing. I was thinking that I might not have properly engaged the torque converter properly. My question is, how many steps does the converter have to drop before it is engaged fully? Im hoping this is the problem, does anybody else have any suggestions on what else it could be? Thanks for the help.