I am going through the same thing with a different combination . I tried to call Hughes today but was too late in the day to talk to anyone . One thing that helps you is the lockup feature. If you use that you can get away with more stall speed than with a non lockup trans. What is a good idle speed for your engine? I would say anything much more than 700 rpm and a stock converter will try to drag the truck at red lights. If it will idle down I would try a stock converter first if you have one. I would also contact Hughes when they are open. Sorry I couldn't be of more help. Jay 6155
