I used to think that but 6 digits is much faster than to turn a safe combination 12 revolutions to open, within 1 number. I converted my manual to an electric lock
I have a tj dana 30 that I pulled from my LJ, I went hp, including calipers and rotors. I am keeping the shocks. $100 located in Ogden Utah area. 3.73, nothing fancy, and you can bolt it in if that’s what you need.
I run type F before, and it is not a problem. So I don’t believe it is an issue to cause the OPs issue, could be an issue with the valve body or servo sticking too.