I have a 1963 cj5 and I think second gear is gone, I'm still going to use it this winter for plowing because I still can use 1st and 2nd. But I got a t90 trans from a friend but it needs to be totally rebuild lots of rust. It says 12-2 on the side of case but no year, does anyone no the year? Buy the way I tried a mixture of automatic transmission fluid and acetone half and half, got it off the web it works for rust.