For one thing, the A4LD's put in 93 and 94 Explorers were significantly upgraded from the A4LD's they put in the 91 and 92 Explorers. There's a thread on here somewhere about the modifications Ford made. I'd suggest putting and A4LD from a 93 or 94 truck in, if you want to go with a new trans. The A4LD can be rebuilt a lot beefier than stock, and someone here has had this done.