I haven't checked out the site for a while, welcome..........
My .02 worth, Install a FTVB. I have an 01 HD w/ 4R100 tranny and love the performance with the FTVB (Factory Tech Valve Body) It's been a year since I've installed and no problems at all. Still shifts crisp. but shifts fine when I don't have my foot in it, which is practically never.