I'm certainly not an expert on them, but for a 4r70w, Silver Fox Transmission seems to be very knowledgeable and Performance Automatic has a decent reputation as well. Monster is well known and you can find bad reviews on pretty much any company, so don't just take my word as gospel. Even Baumann has a lot of info on both transmissions and good controllers.Wesman07":21s7p172 said:Thanks Guhfluh. I have never paid attention to autos before. It’s surprising hard to get solid information on them. Who do you suggest I talk to?