I'm not familiar with the 3.0, so I can't say for certain if the bellhousing bolt pattern change. I don't expect it did, but I can't say for sure.
I expect the 4R44E should bolt in just fine in place of the A4LD. The main issue would be with the electronic controls. The A4LD only controls 3-4 shift and TCC lockup electronically. The 4R44E is all electronically controlled. If you can find a stand alone controller (they are expensive, and I've only seen them listed for the 5R55 transmissions), then it might not be a difficult swap. Either that or you end up installing the entire '96 engine management system into the '93.