I am going to use Auto-RX on my brothers 96 Acura Integra auto transmission with about 130,000 miles on it. It is in bad need of an ATF change and I was going to suggest he add some Auto-RX, drive it around then get it flushed by a shop with Honda ATF. Now his transmission does not have a filter so would it still be safe to use Auto-RX? Would the sludge or whatever else Auto-RX would clean up start circulating through the transmission system and clog the valves and whatnot? Also how long would you suggest I run the Auto-RX for before getting the flush?