The current transmission is making a lot of noise, fibration and I "shoots" out of the 4th gear unless I hold it there by hand. I still did not find out where the current transmission belongs to (#1112610501). I guess a 280, but which one? A 280SE or coupe? If it is from a 280, I could also have it fixed, but I'm not sure what the costs are.
The current rear-end is a 4.08.
Thanks again for your help.