i was just wandering if it would be possible to replace the a4ld tranny with something stronger like the aod trans in a superduty or something, or maybe even a five speed auto. my main reason for considering this is because the a4ld has seemed to be a problem prone transmission. im looking for a tranny that can handle aggresive driving with a little bit more than stock engine.

That was my first decsion when my tranny blew. However, No body made an adapter to fit any auto tranny to the the 4.0 that I could find, Advance Adapters,Kaufman,Duff, Performance Adapters etc. The only choice I had was switching to a T5 or putting a 302 infront of an AOD. With 185K miles on my truck Idecided to gp with the new motor. ( Really had to twist my arm too ;) )

Anyway good luck with your project.