ok, so you didn't take 1.5 miles to stop. You were able to control your "stop", by downshifting and e-braking. Stop in parentheses, because you don't stop, you made a command decision to get off the interstate and get through the intersection. Maybe a quarter mile ramp, and another quarter mile to your house. Your actions make a lot more sense in your last post. You've redeemed yourself, and now everybody knows you weren't cutting off buses full of nuns and children.
Some people may still nitpick the decision not to stop on the ramp and take the truck out of service, but that would be the call for a DOT guy to make, when you explain that you can almost see your house.
Diverman, you and I can both agree that 1 1/2 miles is way too long of a stopping distance for your truck at 50 mph. That indicates a lack of knowledge pertaining to vehicle control, or failure for the operator to acknowledge the seriousness of the malfunction. But you have specified that these distances have nothing to do with your situation, so I withdraw my earlier suggestion that you should have stopped the truck ASAP.
I can speak for many other members when I say that I've been where you are at in your learning curve with your MV. Some learn slow, some learn fast, but many, many of us make mistakes. We should learn from them, and then move on. We should try to learn from others' mistakes instead of having to be first in class in the school of hard-knocks. You might feel scalded by some of the replies, they didn't give you the input that you wanted. Nevertheless, you had the nerve to publicly expose your learning process. By doing so, you may have saved someone's life. For having that courage to expose yourself to the criticism of your peers, I laud you.