What is needed upgrade wise for a 48re? The purchase price of a used trans has to be taken into account in this. $1000.00 is $1000.00.
If the 48re is that much better I'll go that route, but seeing as I have to buy a trans adaptor plate, flexplate, driveshaft, etc anyways; I am leaning towards the 5r110 I have. I do have a 5r110 with all electronics laying around already.