Gregy,

Are you talking about a 4 speed manual or automatic transmission? I have a 350 slc Euro model with a 4 spd. manual trans. I bought it with the idea of putting it in my 450 slc which now has a 3 spd. auto trans. If you are talking about installing a 4 or 5 spd. auto trans. I can't tell you if it will work.