Infinity transmission linkage?

1993 Infinity G20 automatic 150k
Transmission had been slipping occasionally, happened most often when I would slow down and accelerate again, (say from 50 to 25, and back up again). Then, when accelerating moderately from an intersection, there was a pop/clunk and the transmission was completely disengaged -reverse, drive, park, made no difference. The car rolls in any gear even Park. A local engine mechanic mentioned the linkage and/or bands, and found the transmission fluid was low, said it could have got dry and burned up.