Gear damage?

Hello Moose Driver Since I’ve been browsing this forum for some time to be informed about the risks of the used moose I thought to myself, just try it, much can’t be done wrong with this vehicle. I fulfilled my dream and did ‘n Elk V70 II T5 10/2003 all incl. with 50k on the speedometer. The first 2000 km was all great and I floated on cloud 7 with this vehicle. But now I need help. After about 50 km drive the good piece does not move The next day, when the fault memory was read out, the cruel diagnosis of the automatic gearbox was defective. 5500 € for a new one at Volvo. That was too much for me and I looked around for a transmission workshop. See there for 2000 € was a replacement gearbox to have. Now the horror layer really starts. 1. Gear changed (old case and old converter keep) After a thousand meters of sample This can only be the converter says the transmission workshop. 2. Get out and change the converter gear back in. After a thousand meters test drive exactly the same problem. Now it can only lie on the transmission housing, says the transmission workshop, which probably can not hold the pressure because of a hair crack. 3. Get out everything into a new housing tonight I will find out more. Has already one of you with the Geartronic such or similar I have had experiences and know what else could be so. Greetings Volker