When things go wrong, after the first road test i felt a weakness in the trany (I also felt that with the stock weak engine... but!), sloopy, loose and slow shifting, slipping, sometime no neutral and reverse... and so on.  No choice, something is wrong! We had to remove and open this one... Many will say, my trany was fine before!!! I say, was it? I say, well, it's not the engine fault, even if this new one as twice the power, still! when i tested the engine i felt a problem right away. That problem was there for sometime, the new engine didn't help of course but that is not the reason. You will see below what we found in the trany oil.... and it's not in a test drive on 20km that we damage the transmission. We found a lot of metal deposit, once open, we found dry disk, blue, cooked one. Before putting the engine in i checked the torque converter seal and it was cooked, dry like a rock... still, i change this one and hopped for the best, well, the best never came. When you see a dry torque seal.... the other seal will follow soon. It'a always a bit tricky to tell a customer that there we found a new expensive problem after on wile doing major work, but it's a fact when you do major, or not so major work on a 20+ yo vehicle. I feel bad for him but hey! Maybe it's better now and in a shop than wile on a trip. I have tons of work, i didn't need that.. exatly! I don't need more work, i would have preffered that all went well with that trany and the customer would be on the road somewhere... having fun.