My friend's 1990 auto na tranny recently blew out. He got it replaced with a brand new one that the shop was lucky enough to find. 5 days later, it blew up again. He brought it back to the shop and they said that there are no 1990 NA auto trannys available anywhere in the world at this moment and they would have to place a special order for 3 1/2 weeks for Nissan in Japan to build one. Is this logical or did they perhaps screw him by putting in a messed up tranny in the first place? thanks